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id=\"%F0%9F%9B%A2%EF%B8%8F%C2%A0%E5%AD%98%E5%82%A8%E5%BC%95%E6%93%8E%E5%B1%82\">&#x1f6e2;\ufe0f\u00a0\u5b58\u50a8\u5f15\u64ce\u5c42<\/h4>\n<p>\u652f\u6301\u591a\u79cd\u5f15\u64ce\u64cd\u4f5c&#xff0c;\u6bd4\u5982Innodb(\u4e8b\u52a1\u5b89\u5168)\u3001MyIsAM(\u67e5\u8be2\u6027\u80fd\u9ad8)\u3001Archive(\u538b\u7f29\u5b58\u50a8)\u3001Memory(\u5185\u5b58\u5b58\u50a8)<\/p>\n<h4 id=\"%F0%9F%93%81%C2%A0%E6%96%87%E4%BB%B6%E7%B3%BB%E7%BB%9F%E5%B1%82\">&#x1f4c1;\u00a0\u6587\u4ef6\u7cfb\u7edf\u5c42<\/h4>\n<p>\u652f\u6301\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b&#xff1a;NTFS\u3001UFS\u3001ext2\/3\u3001NFS\u3001SAM\u3001NAS<\/p>\n<p>\u65e5\u5fd7\u4e0e\u6570\u636e\u6587\u4ef6&#xff1a;Redo\u3001Undo\u3001\u6570\u636e\u6587\u4ef6(Data)\u3001\u7d22\u5f15\u6587\u4ef6(Index)\u3001\u4e8c\u8fdb\u5236\u65e5\u5fd7(Binary Log)\u3001\u9519<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u8bef\u65e5\u5fd7(Error Log)\u3001\u6162\u67e5\u8be2\u65e5\u5fd7<\/p>\n<h2 id=\"%E4%BA%8C%E3%80%81SQL%E6%9F%A5%E8%AF%A2%E4%B8%8E%E4%BF%AE%E6%94%B9%E5%BA%95%E5%B1%82%E6%89%A7%E8%A1%8C%E9%80%BB%E8%BE%91\">\u4e8c\u3001SQL\u67e5\u8be2\u4e0e\u4fee\u6539\u5e95\u5c42\u6267\u884c\u903b\u8f91<\/h2>\n<p>\u8fd9\u91cc\u53ea\u8bb2Innodb\u5f15\u64ce\u7684\u6d41\u7a0b&#xff0c;\u5e9f\u8bdd\u4e0d\u591a\u8bf4\u76f4\u63a5\u4e0a\u56fe&#xff1a;<\/p>\n<\/p>\n<p class=\"img-center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1030\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260207061714-6986d8ea9ce20.png\" width=\"1262\" \/><\/p>\n<p>\u5b8c\u6574\u6267\u884c\u94fe\u8def&#xff1a;<\/p>\n<p>\u5e94\u7528\u7a0b\u5e8f \u2192 API\u63a5\u53e3\u8c03\u7528 \u2192 \u7f13\u5b58 \u2192 \u8bcd\u6cd5\/\u8bed\u6cd5\u89e3\u6790 \u2192 \u9884\u5904\u7406\u5668&#xff08;\u68c0\u67e5\u8868\u540d\u5217\u540d&#xff09;\u2192 \u8bed\u4e49\u89e3\u6790&#xff08;\u751f\u6210\u89e3\u6790\u6811&#xff09;\u2192 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\u89c6\u56fe\u5c55\u5f00&#xff1a;\u5982\u679c\u6709\u89c6\u56fe&#xff0c;\u5c55\u5f00\u4e3a\u5b9e\u9645\u8868\u64cd\u4f5c<\/p>\n<h4 id=\"6%E3%80%81%E4%BC%98%E5%8C%96%E5%99%A8%EF%BC%9A\">6\u3001\u4f18\u5316\u5668&#xff1a;<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u6838\u5fc3\u4f5c\u7528&#xff1a;\u9009\u62e9\u6700\u4f18\u6267\u884c\u8ba1\u5212&#xff0c;\u51b3\u5b9a\u5982\u4f55\u9ad8\u6548\u7684\u6267\u884c\u987a\u5e8f(\u53ef\u4ee5\u901a\u8fc7explan\u67e5\u8be2&#xff0c;\u4e0b\u9762\u4f1a\u4ecb<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u7ecd)\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u51b3\u7b56\u5185\u5bb9&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u9009\u62e9\u4f7f\u7528\u54ea\u4e2a\u7d22\u5f15(\u6216\u5168\u8868\u626b\u63cf)<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u591a\u8868\u8fde\u63a5\u65f6\u7684\u8fde\u63a5\u987a\u5e8f\u548c\u8fde\u63a5\u65b9\u5f0f<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u5b50\u67e5\u8be2\u4f18\u5316\u7b49<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u25cf\u00a0 \u793a\u4f8b&#xff1a;\u5bf9WHERE id &#061; 1&#xff0c;\u4f18\u5316\u5668\u4f1a\u9009\u62e9\u4e3b\u952e\u7d22\u5f15<\/p>\n<h4 id=\"7%E3%80%81%E6%89%A7%E8%A1%8C%E5%99%A8%EF%BC%9A\">7\u3001\u6267\u884c\u5668&#xff1a;<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u4f5c\u7528&#xff1a;\u6309\u7167\u4f18\u5316\u5668\u7684\u6267\u884c\u8ba1\u5212&#xff0c;\u8c03\u7528\u5b58\u50a8\u5f15\u64ce\u63a5\u53e3<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u6d41\u7a0b&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u6253\u5f00\u76f8\u5173\u8868<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u8c03\u7528InnoDB\u63a5\u53e3\u83b7\u53d6\u6570\u636e<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u5faa\u73af\u5904\u7406\u7b26\u5408\u6761\u4ef6\u7684\u884c<\/p>\n<h3 id=\"%E7%AC%AC%E4%BA%8C%E9%98%B6%E6%AE%B5%EF%BC%9AInnoDB%E5%AD%98%E5%82%A8%E5%BC%95%E6%93%8E%E5%B1%82%E5%A4%84%E7%90%86%EF%BC%88%E4%BA%8B%E5%8A%A1%E6%80%A7%E6%9B%B4%E6%96%B0%EF%BC%89\">\u7b2c\u4e8c\u9636\u6bb5&#xff1a;InnoDB\u5b58\u50a8\u5f15\u64ce\u5c42\u5904\u7406&#xff08;\u4e8b\u52a1\u6027\u66f4\u65b0&#xff09;<\/h3>\n<h4 id=\"1%E3%80%81%E8%AF%BB%E5%8F%96%E6%95%B0%E6%8D%AE%E5%88%B0Buffer%20Pool\">1\u3001\u8bfb\u53d6\u6570\u636e\u5230Buffer Pool<\/h4>\n<p>\u78c1\u76d8\u6587\u4ef6\u2192\u901a\u8fc7IO\u8bfb\u53d6\u2192Buffer Pool&#xff08;\u5185\u5b58\u7f13\u51b2\u6c60&#xff09;<\/p>\n<p>\u25cf\u00a0 Buffer Pool&#xff1a;InnoDB\u7684\u5185\u5b58\u7f13\u5b58\u533a&#xff0c;\u5b58\u653e\u6570\u636e\u9875\u7684\u62f7\u8d1d<\/p>\n<p>\u25cf\u00a0 \u6d41\u7a0b&#xff1a;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u68c0\u67e5\u6240\u9700\u6570\u636e\u9875\u662f\u5426\u5b58\u5728Buffer Pool<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u5982\u679c\u4e0d\u5728(\u672a\u547d\u4e2d)&#xff0c;\u4ece\u78c1\u76d8\u4e2d\u8bfb\u53d6\u5230Buffer Pool<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u6570\u636e\u4ee5\u201c\u9875\u201d\u4e3a\u5355\u4f4d&#xff08;\u9ed8\u8ba416K&#xff09;<\/p>\n<h4 id=\"2%E3%80%81%E5%86%99%E5%85%A5Undo%20Log%EF%BC%88%E6%97%A7%E5%80%BC%E8%AE%B0%E5%BD%95%EF%BC%89\">2\u3001\u5199\u5165Undo Log&#xff08;\u65e7\u503c\u8bb0\u5f55&#xff09;<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u4f5c\u7528&#xff1a;\u8bb0\u5f55\u6570\u636e\u4fee\u6539\u524d\u7684\u503c&#xff0c;\u7528\u4e8e<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u4e8b\u52a1\u56de\u6eda&#xff08;Rollback&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u5b9e\u73b0MVCC&#xff08;\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u25cf\u00a0 \u5185\u5bb9&#xff1a;\u8bb0\u5f55id &#061; 1\u8fd9\u884c\u6570\u636e\u7684\u65e7\u503c&#xff08;\u4fee\u6539\u4e4b\u524d\u7684balance&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u25cf\u00a0 \u6301\u4e45\u5316&#xff1a;Undo Log\u4e5f\u4f1a\u5199\u5165\u78c1\u76d8\u7684Undo\u7a7a\u95f4<\/p>\n<h4 id=\"3%E3%80%81%E6%9B%B4%E6%96%B0Buffer%20Pool%E4%B8%AD%E7%9A%84%E6%95%B0%E6%8D%AE\">3\u3001\u66f4\u65b0Buffer Pool\u4e2d\u7684\u6570\u636e<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5185\u5b58\u4e2d\u7684\u66f4\u65b0&#xff1a;\u5728Buffer Pool\u4e2d\u4fee\u6539\u6570\u636e\u9875<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u72b6\u6001\u53d8\u5316&#xff1a;\u6570\u636e\u9875\u53d8\u4e3a\u201c\u810f\u9875\u201d&#xff08;\u5df2\u78c1\u76d8\u4e0d\u4e00\u81f4&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5ef6\u8fdf\u5199\u5165&#xff1a;\u6b64\u65f6\u4e0d\u4f1a\u7acb\u5373\u5199\u56de\u78c1\u76d8&#xff0c;\u800c\u662f\u7b49\u5f85\u540e\u7eed\u5237\u810f<\/p>\n<h4 id=\"4%E3%80%81%E5%86%99%E5%85%A5Redo%20Log%20Buffer%EF%BC%88%E5%86%85%E5%AD%98%E7%BC%93%E5%AD%98%E5%8C%BA%EF%BC%89\">4\u3001\u5199\u5165Redo Log Buffer&#xff08;\u5185\u5b58\u7f13\u5b58\u533a&#xff09;<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 Redo Log\u4f5c\u7528&#xff1a;\u8bb0\u5f55\u7269\u7406\u4fee\u6539&#xff0c;\u7528\u4e8e\u6545\u969c\u6062\u590d<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u683c\u5f0f&#xff1a;&#034;\u5728\u8868\u7a7a\u95f4X\u7684\u9875\u9762Y\u7684\u504f\u79fbZ\u5904\u5199\u5165\u503cW&#034;&#xff08;\u6b64\u5904\u4e0d\u505a\u8be6\u7ec6\u4ecb\u7ecd&#xff0c;\u53ef\u4ee5\u7f51\u4e0a\u67e5\u627e\u4e0b\u8d44<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u6599&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u7279\u70b9&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u987a\u5e8f\u5199\u5165&#xff0c;\u6027\u80fd\u9ad8<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u5faa\u73af\u8986\u76d6&#xff08;\u56fa\u5b9a\u5927\u5c0f&#xff0c;\u5199\u6ee1\u540e\u8986\u76d6\u65e7\u7684\u8bb0\u5f55&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb Write-Ahead Logging&#xff08;WAL&#xff09;\u539f\u5219&#xff1a;\u5148\u5199\u65e5\u5fd7&#xff0c;\u540e\u5199\u6570\u636e<\/p>\n<h4 id=\"5%E3%80%81Redo%20Log%E5%88%B7%E7%9B%98%EF%BC%88Prepare%E9%98%B6%E6%AE%B5%EF%BC%89\">5\u3001Redo Log\u5237\u76d8&#xff08;Prepare\u9636\u6bb5&#xff09;<\/h4>\n<p>Redo Log Buffer \u2192Redo Log\u6587\u4ef6(\u78c1\u76d8)<\/p>\n<p>\u25cf\u00a0 \u65f6\u673a&#xff1a;\u6839\u636einnodb_flush_log_at_trx_commit\u00a0\u8bbe\u7f6e<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb &#061;1&#xff1a;\u6bcf\u6b21\u4e8b\u52a1\u63d0\u4ea4\u90fd\u5237\u76d8&#xff08;\u6700\u5b89\u5168&#xff0c;\u6027\u80fd\u8f83\u4f4e&#xff09;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb &#061;2&#xff1a;\u6bcf\u79d2\u5237\u76d8&#xff08;\u6027\u80fd\u8f83\u597d&#xff0c;\u53ef\u80fd\u4e22\u59311\u79d2\u6570\u636e&#xff09;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb &#061;0&#xff1a;\u4f9d\u8d56 OS \u5237\u65b0&#xff08;\u4e0d\u63a8\u8350&#xff09;<\/p>\n<p>\u25cf\u00a0 \u72b6\u6001&#xff1a;\u6b64\u65f6Redo Log\u6807\u8bb0\u4e3aPrepare&#xff08;\u4e24\u9636\u6bb5\u63d0\u4ea4\u7684\u7b2c\u4e00\u6b65&#xff09;<\/p>\n<h4 id=\"6%E3%80%81%E5%86%99%E5%85%A5Binlogo\">6\u3001\u5199\u5165Binlogo<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 Binlog\u4f5c\u7528&#xff1a;Mysql Server\u5c42\u7684\u903b\u8f91\u65e5\u5fd7&#xff0c;\u7528\u4e8e<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u4e3b\u4ece\u590d\u5236&#xff08;Replication&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u6570\u636e\u6062\u590d&#xff08;Point-in-Time Recovery&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5185\u5bb9&#xff1a;\u8bb0\u5f55\u903b\u8f91\u64cd\u4f5c&#034;UPDATE users SET balance&#061;&#8230; WHERE id&#061;1&#034;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u4e0eRedo Log\u7684\u533a\u522b&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb Redo Log&#xff1a;\u7269\u7406\u65e5\u5fd7&#xff0c;InnoDB\u5f15\u64ce\u5c42&#xff0c;\u5faa\u73af\u5199<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb Binlog&#xff1a;\u903b\u8f91\u65e5\u5fd7&#xff0c;Server\u5c42&#xff0c;\u8ffd\u52a0\u4e0b<\/p>\n<h4 id=\"7%E3%80%81Redo%20Log%20commit%E6%A0%87%E8%AE%B0\">7\u3001Redo Log commit\u6807\u8bb0<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u4e24\u9636\u6bb5\u63d0\u4ea4(2PC)\u7684\u7b2c\u4e8c\u9636\u6bb5<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5728Redo Log\u4e2d\u5199\u5165Commit\u6807\u8bb0<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u76ee\u7684&#xff1a;\u4fdd\u8bc1Redo Log\u548cBinlog\u7684\u4e00\u81f4\u6027<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5d29\u6e83\u4fee\u590d&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u5982\u679c Redo Log \u6709 Prepare \u65e0 Commit&#xff0c;\u68c0\u67e5 Binlog \u662f\u5426\u5b8c\u6574<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u5982\u679c Binlog \u5b8c\u6574&#xff0c;\u5219\u63d0\u4ea4\u4e8b\u52a1&#xff1b;\u5426\u5219\u56de\u6eda<\/p>\n<h4 id=\"8%E3%80%81%E5%90%8E%E5%8F%B0IO%E7%BA%BF%E7%A8%8B%E5%88%B7%E8%84%8F%E9%A1%B5\">8\u3001\u540e\u53f0IO\u7ebf\u7a0b\u5237\u810f\u9875<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5f02\u6b65\u64cd\u4f5c&#xff1a;\u4e0d\u963b\u585e\u4e8b\u52a1\u63d0\u4ea4<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u89e6\u53d1\u65f6\u673a&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb Buffer Pool\u7a7a\u95f4\u4e0d\u8db3<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u540e\u53f0\u7ebf\u7a0b\u5b9a\u65f6\u5237\u65b0<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u810f\u9875\u6bd4\u4f8b\u8fc7\u9ad8\u65f6<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u6570\u636e\u5e93\u7a7a\u95f2\u65f6<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 Checkpoint&#xff1a;\u6807\u8bb0\u54ea\u4e9b\u810f\u9875\u5df2\u5237\u65b0\u5230\u78c1\u76d8<\/p>\n<h4 id=\"9%E3%80%81%E8%BF%94%E5%9B%9E%E7%BB%93%E6%9E%9C%E7%BB%99%E5%AE%A2%E6%88%B7%E7%AB%AF\">9\u3001\u8fd4\u56de\u7ed3\u679c\u7ed9\u5ba2\u6237\u7aef<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u6267\u884c\u5668\u6536\u5230\u5b58\u50a8\u5f15\u64ce\u7684\u5b8c\u6210\u901a\u77e5<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5411\u5ba2\u6237\u7aef\u8fd4\u56de\u6267\u884c\u7ed3\u679c&#xff08;\u5982&#xff1a;Query OK, 1 row affected&#xff09;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n<h3 id=\"%E4%B8%89%E5%A4%A7%E6%A0%B8%E5%BF%83%E6%97%A5%E5%BF%97%EF%BC%9A%E4%BF%9D%E8%AF%81%E6%95%B0%E6%8D%AE%E4%B8%80%E8%87%B4%E6%80%A7%E5%92%8C%E6%81%A2%E5%A4%8D%E6%80%A7\">\u4e09\u5927\u6838\u5fc3\u65e5\u5fd7&#xff1a;\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\u548c\u6062\u590d\u6027<\/h3>\n<table>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u65e5\u5fd7\u7c7b\u578b<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6240\u5c5e\u7ec4\u4ef6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6838\u5fc3\u4f5c\u7528<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5e94\u7528\u573a\u666f<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Redo Log &#xff08;\u91cd\u505a\u65e5\u5fd7&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>InnoDB<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8bb0\u5f55\u6570\u636e\u9875\u7684\u4fee\u6539&#xff0c;\u652f\u6301\u5d29\u6e83\u4fee\u590d<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Mysql\u5b95\u673a\u540e&#xff0c;\u91cd\u542f\u65f6\u901a\u8fc7Redo Log\u6062\u590d\u672a\u5199\u5165\u78c1\u76d8\u7684\u4fee\u6539&#xff0c;\u4fdd\u969c\u6301\u4e45\u6027<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Undo Log&#xff08;\u56de\u6eda\u65e5\u5fd7&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>InnoDB<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8bb0\u5f55\u4e8b\u52a1\u6267\u884c\u7684\u539f\u59cb\u6570\u636e&#xff0c;\u652f\u6301\u4e8b\u52a1\u56de\u6eda<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1\u6267\u884c\u5931\u8d25\u65f6&#xff0c;\u901a\u8fc7Undo Log\u64a4\u9500\u5df2\u505a\u4fee\u6539&#xff0c;\u4fdd\u969c\u539f\u5b50\u6027&#xff1b;\u540c\u65f6\u652f\u6491MVCC\u5b9e\u73b0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Binlog(\u4e8c\u8fdb\u5236\u65e5\u5fd7)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Mysql\u670d\u52a1\u5668<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8bb0\u5f55\u6240\u6709\u6570\u636e\u7684\u53d8\u66f4(DDL\/DML),\u652f\u6301\u589e\u91cf\u540c\u6b65<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e3b\u4ece\u590d\u5236\u3001\u6570\u636e\u5907\u4efd\u3001\u96c6\u7fa4\u540c\u6b65(\u6838\u5fc3\u65e5\u5fd7)<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5173\u952e\u533a\u522b&#xff1a;<\/p>\n<p>\u00a0\u25cb Redo Log\u548cUndo Log\u662fInnoDB\u5b58\u50a8\u5f15\u64ce\u81ea\u5e26&#xff0c;\u4ec5\u9488\u5bf9InnoDB\u751f\u6548<\/p>\n<p>\u00a0\u25cb Binlog\u662fMySQL\u670d\u52a1\u5668\u5c42\u65e5\u5fd7&#xff0c;\u5bf9\u6240\u6709\u5b58\u50a8\u5f15\u64ce\u751f\u6548<\/p>\n<h2 id=\"%E4%B8%89%E3%80%81InnoDB%E4%B8%8EMyISAM%EF%BC%9A%E5%AD%98%E5%82%A8%E5%BC%95%E6%93%8E%E9%80%89%E5%9E%8B%E6%8C%87%E5%8D%97\">\u4e09\u3001InnoDB\u4e0eMyISAM&#xff1a;\u5b58\u50a8\u5f15\u64ce\u9009\u578b\u6307\u5357<\/h2>\n<p>MySQL\u652f\u6301\u591a\u79cd\u5b58\u50a8\u5f15\u64ce&#xff0c;\u5176\u4e2dInnoDB\u548cMyISAM\u662f\u6700\u5e38\u89c1\u7684\u4e24\u79cd&#xff0c;\u4e8c\u8005\u5728\u4e8b\u52a1\u3001\u9501\u673a\u5236\u3001\u7d22\u5f15\u7ed3\u6784\u7b49\u65b9\u9762\u5dee\u5f02\u663e\u8457&#xff0c;\u9009\u578b\u76f4\u63a5\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u548c\u7a33\u5b9a\u6027&#xff0c;\u5982\u4e0b\u6240\u793a<\/p>\n<h3 id=\"1%E3%80%81%E6%A0%B8%E5%BF%83%E5%8C%BA%E5%88%AB%E5%AF%B9%E6%AF%94\">1\u3001\u6838\u5fc3\u533a\u522b\u5bf9\u6bd4<\/h3>\n<table>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5bf9\u6bd4\u7ef4\u5ea6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>InnoDB(MySQL5.5&#043;\u9ed8\u8ba4)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>MyISAM<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1\u652f\u6301<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u652f\u6301ACID\u4e8b\u52a1<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e0d\u652f\u6301\u4e8b\u52a1<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u9501\u673a\u5236<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u884c\u7ea7\u9501&#xff08;\u7c92\u5ea6\u7ec6&#xff0c;\u9ad8\u5e76\u53d1\u53cb\u597d&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8868\u7ea7\u9501&#xff08;\u7c92\u5ea6\u7c97&#xff0c;\u5e76\u53d1\u6027\u80fd\u5dee&#xff09;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7d22\u5f15\u7ed3\u6784<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>B&#043;\u6811&#xff0c;\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u7d22\u5f15&#043;\u6570\u636e&#xff08;\u805a\u96c6\u7d22\u5f15&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>B &#043; \u6811&#xff0c;\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u7d22\u5f15 &#043; \u6570\u636e\u6307\u9488<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5b58\u50a8\u6587\u4ef6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6570\u636e\u548c\u7d22\u5f15\u5b58\u4e8e\u540c\u4e00\u6587\u4ef6&#xff08;.ibd&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6570\u636e\u6587\u4ef6&#xff08;.MYD&#xff09;\u548c\u7d22\u5f15\u6587\u4ef6&#xff08;.MYI&#xff09;\u5206\u79bb<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u884c\u6570\u7edf\u8ba1<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e0d\u5b58\u50a8\u8868\u884c\u6570&#xff0c;select count(*)\u9700\u5168\u8868\u626b\u63cf<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5185\u7f6e\u884c\u6570\u8ba1\u6570\u5668&#xff0c;select count(*)\u79d2\u7ea7\u8fd4\u56de<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5d29\u6e83\u4fee\u590d<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u652f\u6301&#xff08;\u4f9d\u8d56 Redo\/Undo Log&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e0d\u652f\u6301&#xff0c;\u5d29\u6e83\u540e\u53ef\u80fd\u4e22\u5931\u6570\u636e<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4f7f\u7528\u573a\u666f<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7535\u5546\u8ba2\u5355\u3001\u91d1\u878d\u4ea4\u6613\u7b49\u9700\u8981\u4e8b\u52a1\u3001\u9ad8\u5e76\u53d1\u7684\u573a\u666f<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u535a\u5ba2\u3001\u9759\u6001\u6570\u636e\u67e5\u8be2\u3001\u53ea\u8bfb\u7edf\u8ba1\u7b49\u573a\u666f<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"2%E3%80%81%E9%80%89%E5%9E%8B%E5%BB%BA%E8%AE%AE\">2\u3001\u9009\u578b\u5efa\u8bae<\/h3>\n<p>\u25cf\u00a0 \u751f\u4ea7\u73af\u5883\u4f18\u5148\u9009\u62e9InnoDB&#xff1a;\u9664\u975e\u662f\u7eaf\u53ea\u8bfb\u3001\u65e0\u4e8b\u52a1\u9700\u6c42\u7684\u7b80\u5355\u573a\u666f&#xff0c;\u5426\u5219InnoDB\u7684\u4e8b\u52a1\u652f\u6301\u3001\u884c\u7ea7\u9501\u3001\u5d29\u6e83\u6062\u590d\u80fd\u529b\u66f4\u80fd\u4fdd\u969c\u4e1a\u52a1\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n<p>\u25cf\u00a0 \u817e\u8baf\u4e91MySQL\u4f18\u5316&#xff1a;\u817e\u8baf\u4e91 MySQL \u9ed8\u8ba4\u4f7f\u7528 InnoDB \u5f15\u64ce&#xff0c;\u5e76\u4f18\u5316\u4e86\u65e5\u5fd7\u5237\u76d8\u7b56\u7565\u3001\u9501\u7b49\u5f85\u8d85\u65f6\u8bbe\u7f6e&#xff0c;\u9002\u914d\u4e91\u73af\u5883\u4e0b\u7684\u9ad8\u53ef\u7528\u9700\u6c42&#xff08;\u5982\u4e3b\u4ece\u81ea\u52a8\u5207\u6362\u3001\u6545\u969c\u81ea\u6108&#xff09;\u3002<\/p>\n<h2 id=\"%E5%9B%9B%E3%80%81MySQL%E7%B4%A2%E5%BC%95%EF%BC%9A%E4%BB%8E%E8%AE%BE%E8%AE%A1%E5%88%B0%E9%81%BF%E5%9D%91\">\u56db\u3001MySQL\u7d22\u5f15&#xff1a;\u4ece\u8bbe\u8ba1\u5230\u907f\u5751<\/h2>\n<p>\u7d22\u5f15\u662f MySQL \u63d0\u5347\u67e5\u8be2\u6027\u80fd\u7684\u6838\u5fc3&#xff0c;\u597d\u7684\u7d22\u5f15\u8bbe\u8ba1\u80fd\u8ba9\u67e5\u8be2\u6548\u7387\u63d0\u5347 10 \u500d\u4ee5\u4e0a\u3002\u4f46\u4e0d\u5408\u7406\u7684\u7d22\u5f15\u53cd\u800c\u4f1a\u62d6\u6162\u5199\u5165\u6027\u80fd&#xff0c;\u56e0\u6b64\u9700\u8981\u6df1\u5165\u7406\u89e3\u7d22\u5f15\u7684\u7c7b\u578b\u3001\u539f\u7406\u548c\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n<h3 id=\"1%E3%80%81%E7%B4%A2%E5%BC%95%E5%88%86%E7%B1%BB%EF%BC%88%E5%A4%9A%E7%BB%B4%E5%BA%A6%E6%8B%86%E8%A7%A3%EF%BC%89\">1\u3001\u7d22\u5f15\u5206\u7c7b&#xff08;\u591a\u7ef4\u5ea6\u62c6\u89e3&#xff09;<\/h3>\n<\/p>\n<p class=\"img-center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"525\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260207061715-6986d8eb1e2ba.png\" width=\"533\" \/><\/p>\n<p>(1) \u6309\u7167\u6570\u636e\u7ed3\u6784\u5212\u5206&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 B&#043;\u6811\u7d22\u5f15&#xff1a;MySQL\u9ed8\u8ba4\u7d22\u5f15\u7c7b\u578b&#xff0c;\u652f\u6301\u8303\u56f4\u67e5\u8be2\u3001\u6392\u5e8f&#xff0c;\u9002\u5408\u7edd\u5927\u591a\u6570\u573a\u666f&#xff08;\u4e3b\u952e\u3001\u666e\u901a\u7d22\u5f15\u3001\u8054\u5408\u7d22\u5f15\u5747\u57fa\u4e8e B &#043; \u6811&#xff09;\u3002<span style=\"color:#fe2c24\">B&#043;\u6811\u7684\u89c4\u5b9a\u662f\u5c0f\u4e8e\u5f80\u5de6\u8d70&#xff0c;\u5927\u4e8e\u5f80\u53f3\u8d70<\/span><\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u54c8\u5e0c\u7d22\u5f15&#xff1a;\u57fa\u4e8e\u54c8\u5e0c\u8868&#xff0c;\u4ec5\u652f\u6301\u7b49\u503c\u67e5\u8be2&#xff08;&#061;\u3001in&#xff09;&#xff0c;\u4e0d\u652f\u6301\u8303\u56f4\u67e5\u8be2\u548c\u6392\u5e8f&#xff0c;\u9002\u7528\u4e8e\u9ad8\u9891\u7b49\u503c\u67e5\u8be2\u573a\u666f&#xff08;\u5982\u7f13\u5b58\u952e\u503c\u6620\u5c04&#xff09;\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u5168\u6587\u7d22\u5f15&#xff1a;\u9488\u5bf9\u6587\u672c\u5185\u5bb9&#xff08;\u5982\u6587\u7ae0\u6b63\u6587&#xff09;\u7684\u5173\u952e\u8bcd\u68c0\u7d22&#xff0c;\u652f\u6301MATCH AGAINST\u67e5\u8be2&#xff0c;\u4e0d\u9002\u5408\u7cbe\u786e\u5339\u914d\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 R-Tree\u7d22\u5f15&#xff1a;\u7528\u4e8e\u7a7a\u95f4\u6570\u636e\u7c7b\u578b&#xff08;\u5982 GIS \u5730\u7406\u4fe1\u606f&#xff09;&#xff0c;\u652f\u6301\u7a7a\u95f4\u8303\u56f4\u67e5\u8be2\u3002<\/p>\n<p>(2) \u6309\u5b58\u50a8\u7269\u7406\u5212\u5206&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u805a\u96c6\u7d22\u5f15(\u805a\u7c07\u7d22\u5f15)&#xff1a;\u6570\u636e\u4e0e\u7d22\u5f15\u5b58\u50a8\u5728\u4e00\u8d77&#xff0c;\u53f6\u5b50\u8282\u70b9\u76f4\u63a5\u5b58\u50a8\u884c\u6570\u636e&#xff08;\u4e00\u5f20\u8868\u6709\u4e14\u4ec5\u6709<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u4e00\u4e2a&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u4f18\u5148\u7ea7&#xff1a;\u4e3b\u952e\u7d22\u5f15 \u2192 \u7b2c\u4e00\u4e2a\u552f\u4e00\u7d22\u5f15 \u2192 InnoDB \u81ea\u52a8\u751f\u6210\u7684\u9690\u85cf rowid&#xff08;\u65e0\u4e3b\u952e \/ \u552f\u4e00\u7d22<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u5f15\u65f6&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u4f18\u52bf&#xff1a;\u67e5\u8be2\u4e3b\u952e\u65f6\u65e0\u9700\u56de\u8868&#xff0c;\u76f4\u63a5\u83b7\u53d6\u6570\u636e<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u4e8c\u7ea7\u7d22\u5f15(\u975e\u805a\u7c07\u7d22\u5f15)&#xff1a;\u6570\u636e\u4e0e\u7d22\u5f15\u5206\u79bb&#xff0c;\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u4e3b\u952e\u503c&#xff08;\u4e00\u5f20\u8868\u53ef\u591a\u4e2a&#xff09;<\/p>\n<p>(3) \u6309\u7167\u903b\u8f91\u529f\u80fd\u5212\u5206&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u4e3b\u952e\u7d22\u5f15&#xff1a;\u552f\u4e00\u6807\u8bc6\u884c\u6570\u636e&#xff0c;\u4e0d\u53ef\u4e3a\u7a7a&#xff0c;\u4e00\u5f20\u8868\u4ec5\u6709\u4e00\u4e2a<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u552f\u4e00\u7d22\u5f15&#xff1a;\u907f\u514d\u5217\u503c\u91cd\u590d&#xff08;\u5141\u8bb8\u4e3a\u7a7a&#xff0c;\u4f46\u6700\u591a\u4e00\u4e2a NULL&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u666e\u901a\u7d22\u5f15&#xff1a;\u81ea\u5b9a\u4e49\u7d22\u5f15&#xff0c;\u65e0\u552f\u4e00\u6027\u7ea6\u675f<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u8054\u5408\u7d22\u5f15&#xff1a;\u591a\u5217\u7ec4\u5408\u7684\u7d22\u5f15&#xff08;\u5982idx_name_age (name, age)&#xff09;&#xff0c;\u9075\u5faa \u201c\u6700\u5de6\u524d\u7f00\u539f\u5219\u201d<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u8986\u76d6\u7d22\u5f15&#xff1a;\u67e5\u8be2\u5217\u5b8c\u5168\u5305\u542b\u5728\u7d22\u5f15\u4e2d&#xff0c;\u65e0\u9700\u56de\u8868&#xff08;\u5982select name from user where\u00a0<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0name&#061;&#039;\u77f3&#039;&#xff0c;\u82e5name\u662f\u4e8c\u7ea7\u7d22\u5f15&#xff0c;\u5219\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c&#xff09;<\/p>\n<h3 id=\"2%E3%80%81%E6%A0%B8%E5%BF%83%E5%8E%9F%E7%90%86%EF%BC%9A%E5%9B%9E%E8%A1%A8%E4%B8%8E%E8%A6%86%E7%9B%96%E7%B4%A2%E5%BC%95%E5%AE%9E%E6%88%98\">2\u3001\u6838\u5fc3\u539f\u7406&#xff1a;\u56de\u8868\u4e0e\u8986\u76d6\u7d22\u5f15\u5b9e\u6218<\/h3>\n<p>&#8212; \u8868\u7ed3\u6784&#xff1a;user(id int primary key, name varchar(20), age int)&#xff0c;idx_name(name)\u4e3a\u4e8c\u7ea7\u7d22\u5f15<br \/>\n&#8212; \u6848\u4f8b1&#xff1a;\u975e\u8986\u76d6\u7d22\u5f15&#xff08;\u9700\u8981\u56de\u8868&#xff09;<br \/>\nselect * from user where name&#061;&#039;\u77f3&#039;;<br \/>\n&#8212; \u6267\u884c\u6d41\u7a0b&#xff1a;idx_name\u627e\u5230name&#061;&#039;\u77f3&#039;\u5bf9\u5e94\u7684\u4e3b\u952eid \u2192 \u805a\u96c6\u7d22\u5f15\u901a\u8fc7id\u67e5\u8be2\u884c\u6570\u636e&#xff08;\u56de\u8868&#xff09;<\/p>\n<p>&#8212; \u6848\u4f8b2&#xff1a;\u8986\u76d6\u7d22\u5f15&#xff08;\u65e0\u9700\u56de\u8868&#xff09;<br \/>\nselect name from user where name&#061;&#039;\u77f3&#039;;<br \/>\n&#8212; \u6267\u884c\u6d41\u7a0b&#xff1a;idx_name\u7684\u53f6\u5b50\u8282\u70b9\u76f4\u63a5\u5b58\u50a8name\u503c&#xff0c;\u65e0\u9700\u56de\u8868&#xff0c;\u6548\u7387\u63d0\u534750%&#043; <\/p>\n<p><span style=\"color:#fe2c24\">\u603b\u7ed3&#xff1a;\u5c31\u662f\u8868\u76f4\u63a5\u8bbe\u7f6e\u4e8c\u7ea7\u7d22\u5f15&#xff0c;\u5219\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c&#xff0c;\u5982\u679c\u6ca1\u6709\u8bbe\u7f6e\u7d22\u5f15&#xff1b;\u90a3\u4e48\u4f1a\u627e\u5230\u5bf9\u5e94\u7684id\u518d\u8fdb\u884c\u67e5\u8be2&#xff0c;\u4e5f\u5c31\u662f\u56de\u8868<\/span><\/p>\n<h3 id=\"3%E3%80%81%E7%B4%A2%E5%BC%95%E8%AE%BE%E8%AE%A1%E6%9C%80%E4%BD%B3%E5%AE%9E%E8%B7%B5%EF%BC%88%E9%81%BF%E5%9D%91%E6%8C%87%E5%8D%97%EF%BC%89\">3\u3001\u7d22\u5f15\u8bbe\u8ba1\u6700\u4f73\u5b9e\u8df5&#xff08;\u907f\u5751\u6307\u5357&#xff09;<\/h3>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u25cf\u00a0 \u9075\u5faa \u201c\u6700\u5de6\u524d\u7f00\u539f\u5219\u201d&#xff1a;\u8054\u5408\u7d22\u5f15idx_a_b_c&#xff0c;\u4ec5\u652f\u6301a\u3001a&#043;b\u3001a&#043;b&#043;c\u67e5\u8be2&#xff0c;\u4e0d\u652f\u6301b\u3001b&#043;c<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u67e5\u8be2\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u25cf\u00a0 \u907f\u514d\u7d22\u5f15\u5931\u6548&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u4e0d\u4f7f\u7528\u51fd\u6570\u64cd\u4f5c\u7d22\u5f15\u5217&#xff08;\u5982where date(create_time)&#061;&#039;2024-01-01&#039;&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u4e0d\u4f7f\u7528\u6a21\u7cca\u67e5\u8be2\u524d\u7f00 %&#xff08;\u5982where name like &#039;%\u77f3&#039;&#xff0c;\u4f1a\u5bfc\u81f4\u5168\u8868\u626b\u63cf&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u907f\u514d\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362&#xff08;\u5982where id&#061;&#039;1&#039;&#xff0c;\u5b57\u7b26\u4e32\u8f6c\u6570\u5b57\u5bfc\u81f4\u7d22\u5f15\u5931\u6548&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u25cf\u00a0 \u63a7\u5236\u7d22\u5f15\u5931\u6548&#xff1a;\u7d22\u5f15\u8d8a\u591a&#xff0c;\u5199\u5165&#xff08;insert\/update\/delete&#xff09;\u8d8a\u6162&#xff08;\u9700\u7ef4\u62a4\u7d22\u5f15\u7ed3\u6784&#xff09;&#xff0c;\u5355\u8868\u7d22<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5f15\u5efa\u8bae\u4e0d\u8d85\u8fc7 5 \u4e2a\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u25cf\u00a0 \u8986\u76d6\u7d22\u5f15&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u5982\u679c\u67e5\u8be2\u7684\u5217\u90fd\u5305\u542b\u5728\u7d22\u5f15\u4e2d&#xff0c;\u90a3\u4e48\u5c31\u4e0d\u9700\u8981\u56de\u8868\u67e5\u8be2&#xff0c;\u8fd9\u79f0\u4e3a\u7d22\u5f15\u8986\u76d6<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u4f8b\u5982&#xff0c;\u6709\u4e00\u4e2a\u7d22\u5f15(name, age)&#xff0c;\u67e5\u8be2SELECT name, age FROM user WHERE name &#061;\u00a0<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0&#039;John&#039;\u5c31\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u8986\u76d6\u3002<\/p>\n<p>\u00a0 \u00a0\u25cf\u00a0 \u7d22\u5f15\u4e0b\u63a8&#xff1a;MySQL 5.6\u5f15\u5165&#xff0c;\u53ef\u4ee5\u5728\u7d22\u5f15\u904d\u5386\u8fc7\u7a0b\u4e2d&#xff0c;\u5bf9\u7d22\u5f15\u4e2d\u5305\u542b\u7684\u5b57\u6bb5\u5148\u505a\u5224\u65ad&#xff0c;\u76f4\u63a5<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u8fc7\u6ee4\u6389\u4e0d\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55&#xff0c;\u51cf\u5c11\u56de\u8868\u6b21\u6570\u3002<\/p>\n<h2 id=\"%E4%BA%94%E3%80%81MySQL%E4%BA%8B%E5%8A%A1%EF%BC%9AACID%E4%B8%8E%E9%9A%94%E7%A6%BB%E5%AE%9E%E6%88%98\">\u4e94\u3001MySQL\u4e8b\u52a1&#xff1a;ACID\u4e0e\u9694\u79bb\u5b9e\u6218<\/h2>\n<p>\u4e8b\u52a1\u662f\u6570\u636e\u5e93\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\u7684\u6838\u5fc3\u673a\u5236&#xff0c;\u5c24\u5176\u662f\u5728\u7535\u5546\u4e0b\u5355\u3001\u91d1\u878d\u8f6c\u8d26\u7b49\u573a\u666f\u4e2d&#xff0c;\u5fc5\u987b\u6df1\u5165\u7406\u89e3\u4e8b\u52a1\u7684 ACID \u7279\u6027\u3001\u9694\u79bb\u7ea7\u522b\u53ca\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n<h3 id=\"1%E3%80%81%E4%BA%8B%E5%8A%A1%E7%9A%84ACID%E5%8E%9F%E5%88%99\">1\u3001\u4e8b\u52a1\u7684ACID\u539f\u5219<\/h3>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u539f\u5b50\u6027&#xff08;Atomicity&#xff09;&#xff1a;\u4e8b\u52a1\u662f\u4e0d\u53ef\u5206\u5272\u7684\u6700\u5c0f\u5355\u4f4d&#xff0c;\u8981\u4e48\u5168\u90e8\u6267\u884c\u6210\u529f&#xff0c;\u8981\u4e48\u5168\u90e8\u56de\u6eda&#xff08;\u5982<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u8f6c\u8d26&#xff1a;\u6263\u6b3e\u548c\u5230\u8d26\u5fc5\u987b\u540c\u65f6\u6210\u529f\u6216\u5931\u8d25&#xff09;\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u4e00\u81f4\u6027&#xff08;Consistency&#xff09;&#xff1a;\u4e8b\u52a1\u6267\u884c\u524d\u540e&#xff0c;\u6570\u636e\u603b\u72b6\u6001\u4fdd\u6301\u4e00\u81f4&#xff08;\u5982\u8f6c\u8d26\u524d A \u6709 100 \u5143\u3001B\u00a0<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u6709 50 \u5143&#xff0c;\u8f6c\u8d26\u540e\u603b\u548c\u4ecd\u4e3a 150 \u5143&#xff09;\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u9694\u79bb\u6027&#xff08;Isolation&#xff09;&#xff1a;\u591a\u4e2a\u4e8b\u52a1\u5e76\u53d1\u6267\u884c\u65f6&#xff0c;\u76f8\u4e92\u4e0d\u5e72\u6270&#xff0c;\u6bcf\u4e2a\u4e8b\u52a1\u90fd\u611f\u89c9\u4e0d\u5230\u5176\u4ed6\u4e8b\u52a1\u7684<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5b58\u5728\u3002<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u6301\u4e45\u6027&#xff08;Durability&#xff09;&#xff1a;\u4e8b\u52a1\u63d0\u4ea4\u540e&#xff0c;\u6570\u636e\u6c38\u4e45\u5199\u5165\u78c1\u76d8&#xff0c;\u5373\u4f7f\u7cfb\u7edf\u5d29\u6e83\u4e5f\u4e0d\u4f1a\u4e22\u5931<\/p>\n<h3 id=\"2%E3%80%81%E5%B9%B6%E5%8F%91%E4%BA%8B%E5%8A%A1%E5%B8%B8%E8%A7%81%E7%9A%84%E4%B8%89%E5%A4%A7%E9%97%AE%E9%A2%98\">2\u3001\u5e76\u53d1\u4e8b\u52a1\u5e38\u89c1\u7684\u4e09\u5927\u95ee\u9898<\/h3>\n<table>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u95ee\u9898\u7c7b\u578b<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5b9a\u4e49<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u573a\u666f\u793a\u4f8b<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u810f\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1 A \u8bfb\u53d6\u5230\u4e8b\u52a1 B \u672a\u63d0\u4ea4\u7684\u4fee\u6539<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1 B \u4fee\u6539\u7528\u6237\u4f59\u989d\u4f46\u672a\u63d0\u4ea4&#xff0c;\u4e8b\u52a1 A \u8bfb\u53d6\u5230\u8be5\u4f59\u989d&#xff0c;\u968f\u540e\u4e8b\u52a1 B \u56de\u6eda&#xff0c;A \u8bfb\u53d6\u7684\u662f \u201c\u810f\u6570\u636e\u201d<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e0d\u53ef\u91cd\u590d\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1 A \u591a\u6b21\u8bfb\u53d6\u540c\u4e00\u6570\u636e&#xff0c;\u7ed3\u679c\u4e0d\u4e00\u81f4&#xff08;\u56e0\u4e8b\u52a1 B \u4fee\u6539\u5e76\u63d0\u4ea4&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1 A \u7b2c\u4e00\u6b21\u8bfb\u53d6\u4f59\u989d\u4e3a 100 \u5143&#xff0c;\u4e8b\u52a1 B \u4fee\u6539\u4e3a 80 \u5143\u5e76\u63d0\u4ea4&#xff0c;A \u518d\u6b21\u8bfb\u53d6\u4e3a 80 \u5143<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5e7b\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1 A \u8bfb\u53d6\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u540e&#xff0c;\u4e8b\u52a1 B \u63d2\u5165\u65b0\u8bb0\u5f55&#xff0c;A \u518d\u6b21\u8bfb\u53d6\u65f6\u591a\u4e86 \u201c\u5e7b\u5f71\u201d \u8bb0\u5f55<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u52a1 A \u67e5\u8be2 \u201c\u5e74\u9f84&gt; 20\u201d \u7684\u7528\u6237\u6709 10 \u4eba&#xff0c;\u4e8b\u52a1 B \u63d2\u5165 1 \u4e2a\u5e74\u9f84 25 \u7684\u7528\u6237&#xff0c;A \u518d\u6b21\u67e5\u8be2\u53d8\u4e3a 11 \u4eba<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"3%E3%80%81%E4%BA%8B%E5%8A%A1%E9%9A%94%E7%A6%BB%E7%BA%A7%E5%88%AB%EF%BC%88%E4%BB%8E%E4%BD%8E%E5%88%B0%E9%AB%98%EF%BC%89\">3\u3001\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b&#xff08;\u4ece\u4f4e\u5230\u9ad8&#xff09;<\/h3>\n<table>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u9694\u79bb\u7ea7\u522b<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u810f\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e0d\u53ef\u91cd\u590d\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5e7b\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6027\u80fd<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u9002\u7528\u573a\u666f<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8bfb\u672a\u63d0\u4ea4<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5141\u8bb8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5141\u8bb8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5141\u8bb8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6700\u9ad8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u65e0&#xff08;\u6570\u636e\u4e00\u81f4\u6027\u65e0\u6cd5\u4fdd\u969c&#xff09;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8bfb\u5df2\u63d0\u4ea4<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u6b62<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5141\u8bb8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5141\u8bb8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8f83\u9ad8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5927\u90e8\u5206\u4e92\u8054\u7f51\u573a\u666f&#xff08;\u5982\u65b0\u95fb\u3001\u8bba\u575b&#xff09;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u53ef\u91cd\u590d\u8bfb<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u6b62<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u6b62<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u90e8\u5206\u7981\u6b62&#xff08;MVCC&#xff09;<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e2d\u7b49<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7535\u5546\u3001\u91d1\u878d\u7b49\u9700\u8981\u4e00\u81f4\u6027\u7684\u573a\u666f&#xff08;MySQL \u9ed8\u8ba4\u7ea7\u522b&#xff09;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e32\u884c\u5316<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u6b62<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u6b62<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u6b62<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6700\u4f4e<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u6781\u9ad8\u7684\u573a\u666f&#xff08;\u5982\u94f6\u884c\u6838\u5fc3\u4ea4\u6613&#xff09;<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"4%E3%80%81%E5%AE%9E%E6%88%98%E6%8A%80%E5%B7%A7\">4\u3001\u5b9e\u6218\u6280\u5de7<\/h3>\n<p>\u25cf\u00a0 \u9694\u79bb\u7ea7\u522b\u8bbe\u7f6e&#xff1a;<\/p>\n<p>&#8212; \u5168\u5c40\u7ea7&#xff08;\u91cd\u542f\u751f\u6548&#xff09;<br \/>\nset global transaction isolation level repeatable read;<br \/>\n&#8212; \u4f1a\u8bdd\u7ea7&#xff08;\u5f53\u524d\u8fde\u63a5\u751f\u6548&#xff09;<br \/>\nset session transaction isolation level read committed; <\/p>\n<p>\u25cf\u00a0 MVCC\u673a\u5236&#xff1a;MySQL \u9ed8\u8ba4\u7684 \u201c\u53ef\u91cd\u590d\u8bfb\u201d \u7ea7\u522b\u901a\u8fc7 MVCC&#xff08;\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236&#xff09;\u907f\u514d\u5e7b\u8bfb\u3002\u6838\u5fc3\u539f<\/p>\n<p>\u00a0 \u00a0\u00a0\u7406\u662f&#xff1a;\u4e8b\u52a1\u5f00\u542f\u65f6\u751f\u6210 Read View&#xff08;\u8bfb\u89c6\u56fe&#xff09;&#xff0c;\u67e5\u8be2\u65f6\u901a\u8fc7 Undo Log \u7248\u672c\u94fe\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u5386<\/p>\n<p>\u00a0 \u00a0 \u53f2\u6570\u636e&#xff0c;\u5b9e\u73b0 \u201c\u4e0d\u52a0\u9501\u975e\u963b\u585e\u8bfb\u201d\u3002<\/p>\n<p>\u25cf\u00a0 \u817e\u8baf\u4e91MySQL\u4f18\u5316&#xff1a;\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\u4e3a\u53ef\u91cd\u590d\u8bfb&#xff0c;\u540c\u65f6\u4f18\u5316\u4e86 MVCC \u7684\u7248\u672c\u94fe\u6e05\u7406\u7b56\u7565&#xff0c;\u907f\u514d<\/p>\n<p>\u00a0 \u00a0 Undo Log \u81a8\u80c0\u5bfc\u81f4\u7684\u6027\u80fd\u95ee\u9898\u3002\u00a0 \u00a0<\/p>\n<\/p>\n<h2 id=\"%E5%85%AD%E3%80%81MySQL%E9%94%81%E6%9C%BA%E5%88%B6%EF%BC%9A%E9%81%BF%E5%85%8D%E5%B9%B6%E5%8F%91%E5%86%B2%E7%AA%81\">\u516d\u3001MySQL\u9501\u673a\u5236&#xff1a;\u907f\u514d\u5e76\u53d1\u51b2\u7a81<\/h2>\n<p>\u9501\u662f MySQL \u5b9e\u73b0\u4e8b\u52a1\u9694\u79bb\u7684\u57fa\u7840&#xff0c;\u4e0d\u540c\u7684\u9501\u7c92\u5ea6\u548c\u7c7b\u578b\u5bf9\u5e94\u4e0d\u540c\u7684\u5e76\u53d1\u573a\u666f\u3002\u7406\u89e3\u9501\u673a\u5236\u80fd\u5e2e\u52a9\u6211\u4eec\u907f\u514d\u6b7b\u9501\u3001\u9501\u7b49\u5f85\u8d85\u65f6\u7b49\u95ee\u9898\u3002<\/p>\n<h3 id=\"1%E3%80%81%E9%94%81%E7%9A%84%E5%88%86%E7%B1%BB\">1\u3001\u9501\u7684\u5206\u7c7b<\/h3>\n<p>\u00a0(1) \u6309\u7167\u64cd\u4f5c\u7c7b\u578b\u5212\u5206<\/p>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u8bfb\u9501&#xff08;\u5171\u4eab\u9501&#xff0c;S \u9501&#xff09;&#xff1a;\u591a\u4e2a\u4e8b\u52a1\u53ef\u540c\u65f6\u6301\u6709&#xff0c;\u4e92\u4e0d\u5e72\u6270&#xff08;\u8bfb &#8211; \u8bfb\u517c\u5bb9&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u8bed\u6cd5&#xff1a;select * from user where id&#061;1 lock in share mode;<\/p>\n<p>\u00a0 \u00a0\u25cf\u00a0 \u5199\u9501&#xff08;\u6392\u4ed6\u9501&#xff0c;X \u9501&#xff09;&#xff1a;\u540c\u4e00\u65f6\u95f4\u4ec5\u4e00\u4e2a\u4e8b\u52a1\u6301\u6709&#xff0c;\u963b\u585e\u5176\u4ed6\u8bfb\u9501\u548c\u5199\u9501&#xff08;\u8bfb &#8211; \u5199\u3001\u5199 &#8211; \u5199<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u4e92\u65a5&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u8bed\u6cd5&#xff1a;select * from user where id&#061;1 for update;&#xff08;\u4e8b\u52a1\u63d0\u4ea4 \/ \u56de\u6eda\u540e\u91ca\u653e&#xff09;<\/p>\n<p>(2) \u6309\u9501\u7c92\u5ea6\u5212\u5206<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u8868\u9501&#xff1a;\u9501\u5b9a\u6574\u5f20\u8868&#xff0c;\u5f00\u9500\u5c0f\u3001\u901f\u5ea6\u5feb&#xff0c;\u4f46\u5e76\u53d1\u6027\u80fd\u5dee&#xff08;MyISAM \u9ed8\u8ba4\u9501\u673a\u5236&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb \u89e6\u53d1\u573a\u666f&#xff1a;InnoDB \u5728\u7d22\u5f15\u5931\u6548\u65f6&#xff0c;\u884c\u9501\u4f1a\u5347\u7ea7\u4e3a\u8868\u9501&#xff08;\u5982where name like &#039;%\u77f3&#039;\u65e0\u7d22<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u5f15&#xff0c;\u5bfc\u81f4\u5168\u8868\u626b\u63cf &#043; \u8868\u9501&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u884c\u9501&#xff1a;\u9501\u5b9a\u5355\u884c\u6570\u636e&#xff0c;\u5f00\u9500\u5927\u3001\u901f\u5ea6\u6162&#xff0c;\u4f46\u5e76\u53d1\u6027\u80fd\u597d&#xff08;InnoDB \u9ed8\u8ba4\u9501\u673a\u5236&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u25cb <span style=\"color:#fe2c24\">\u6ce8\u610f&#xff1a;\u884c\u9501\u662f\u57fa\u4e8e\u7d22\u5f15\u7684&#xff0c;\u65e0\u7d22\u5f15\u65f6\u4f1a\u9000\u5316\u4e3a\u8868\u9501<\/span><\/p>\n<h3 id=\"2%E3%80%81%E9%94%81%E6%9C%BA%E5%88%B6%E5%AE%9E%E6%88%98%E5%BB%BA%E8%AE%AE\">2\u3001\u9501\u673a\u5236\u5b9e\u6218\u5efa\u8bae<\/h3>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u25cf\u00a0 \u907f\u514d\u884c\u7ea7\u9501\u5347\u7ea7\u4e3a\u8868\u9501&#xff1a;\u786e\u4fdd\u67e5\u8be2\u8bed\u53e5\u4f7f\u7528\u7d22\u5f15&#xff0c;\u907f\u514d\u5168\u8868\u626b\u63cf<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u5c0f\u8868\u9a71\u52a8\u5927\u8868&#xff1a;\u591a\u8868 join \u65f6&#xff0c;\u7528\u5c0f\u8868\u4f5c\u4e3a\u9a71\u52a8\u8868&#xff08;\u51cf\u5c11\u9501\u7b49\u5f85\u65f6\u95f4&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u907f\u514d\u6b7b\u9501&#xff1a;\u786e\u4fdd\u67e5\u8be2\u8bed\u53e5\u4f7f\u7528\u7d22\u5f15&#xff0c;\u907f\u514d\u5168\u8868\u626b\u63cf<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u7edf\u4e00\u4e8b\u52a1\u5185\u7684\u8868\u8bbf\u95ee\u987a\u5e8f&#xff08;\u5982\u5148\u8bbf\u95ee A \u8868\u518d\u8bbf\u95ee B \u8868&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cb \u51cf\u5c11\u957f\u4e8b\u52a1&#xff08;\u957f\u4e8b\u52a1\u4f1a\u6301\u6709\u9501\u66f4\u4e45&#xff0c;\u589e\u52a0\u6b7b\u9501\u6982\u7387&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u25cf\u00a0 \u817e\u8baf\u4e91MySQL\u76d1\u63a7&#xff1a;\u901a\u8fc7\u817e\u8baf\u4e91\u6570\u636e\u5e93\u63a7\u5236\u53f0\u67e5\u770b\u9501\u7b49\u5f85\u6b21\u6570\u3001\u6b7b\u9501\u65e5\u5fd7&#xff0c;\u53ca\u65f6\u4f18\u5316 SQL<\/p>\n<h2 id=\"%E4%B8%83%E3%80%81MySQL%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%EF%BC%9A%E4%BB%8E%E5%9F%BA%E7%A1%80%E5%88%B0%E5%88%86%E5%B8%83%E5%BC%8F\">\u4e03\u3001MySQL\u6027\u80fd\u4f18\u5316&#xff1a;\u4ece\u57fa\u7840\u5230\u5206\u5e03\u5f0f<\/h2>\n<p>MySQL \u4f18\u5316\u662f\u4e00\u4e2a\u7cfb\u7edf\u5de5\u7a0b&#xff0c;\u6d89\u53ca SQL \u7f16\u5199\u3001\u7d22\u5f15\u8bbe\u8ba1\u3001\u67b6\u6784\u8bbe\u8ba1\u7b49\u591a\u4e2a\u5c42\u9762\u3002\u4ee5\u4e0b\u662f\u751f\u4ea7\u73af\u5883\u4e2d\u6700\u5b9e\u7528\u7684\u4f18\u5316\u65b9\u6848&#xff1a;<\/p>\n<h3 id=\"1%E3%80%81%E5%9F%BA%E7%A1%80%E4%BC%98%E5%8C%96%EF%BC%9ASQL%E4%B8%8E%E8%A1%A8%E8%AE%BE%E8%AE%A1\">1\u3001\u57fa\u7840\u4f18\u5316&#xff1a;SQL\u4e0e\u8868\u8bbe\u8ba1<\/h3>\n<p>\u25cf\u00a0 \u4f18\u5316\u67e5\u8be2\u8bed\u53e5&#xff1a;\u786e\u4fdd\u67e5\u8be2\u8bed\u53e5\u4f7f\u7528\u7d22\u5f15&#xff0c;\u907f\u514d\u5168\u8868\u626b\u63cf<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u7528EXPLAIN\u5206\u6790 SQL \u6267\u884c\u8ba1\u5212&#xff08;\u91cd\u70b9\u5173\u6ce8key&#xff08;\u662f\u5426\u547d\u4e2d\u7d22\u5f15&#xff09;\u3001type&#xff08;\u8bbf\u95ee\u7c7b\u578b&#xff09;\u3001Extra<\/p>\n<p>\u00a0 &#xff08;\u56de\u8868\u3001\u5168\u8868\u626b\u63cf\u7b49&#xff09;&#xff09;\u00a0\u00a0<\/p>\n<p>\u00a0\u00a0\u25cb \u907f\u514dselect *&#xff0c;\u4f18\u5148\u4f7f\u7528\u8986\u76d6\u7d22\u5f15<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u591a\u8868 join \u65f6\u4f18\u5148\u4f7f\u7528\u5185\u8fde\u63a5&#xff08;inner join&#xff09;&#xff0c;\u907f\u514d\u5de6 \/ \u53f3\u8fde\u63a5&#xff08;\u53ef\u80fd\u5bfc\u81f4\u5168\u8868\u626b\u63cf&#xff09;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u805a\u5408\u67e5\u8be2\u7528union all\u66ff\u4ee3union&#xff08;union\u4f1a\u53bb\u91cd&#xff0c;\u6027\u80fd\u5f00\u9500\u5927&#xff09;<\/p>\n<p>\u25cf\u00a0 \u8868\u7ed3\u6784\u8bbe\u8ba1&#xff1a;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u6570\u503c\u7c7b\u578b\u4f18\u5148\u7528tinyint\u3001int\u3001bigint&#xff08;\u907f\u514dvarchar\u5b58\u6570\u5b57&#xff09;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u5b57\u7b26\u4e32\u7c7b\u578b&#xff1a;\u56fa\u5b9a\u957f\u5ea6\u7528char&#xff0c;\u53ef\u53d8\u957f\u5ea6\u7528varchar&#xff08;text\u4ec5\u7528\u4e8e\u5927\u6587\u672c&#xff09;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u907f\u514d\u8fc7\u5ea6\u8bbe\u8ba1&#xff08;\u5982\u62c6\u5206\u8fc7\u591a\u5b57\u6bb5\u3001\u5197\u4f59\u5b57\u6bb5&#xff09;<\/p>\n<h3 id=\"2%E3%80%81%E8%BF%9B%E9%98%B6%E4%BC%98%E5%8C%96%EF%BC%9A%E7%B4%A2%E5%BC%95%E4%B8%8E%E5%88%86%E9%A1%B5\">2\u3001\u8fdb\u9636\u4f18\u5316&#xff1a;\u7d22\u5f15\u4e0e\u5206\u9875<\/h3>\n<p>\u25cf\u00a0 \u8d85\u5927\u5206\u9875\u4f18\u5316&#xff1a;\u6570\u636e\u91cf\u8d85\u8fc7 10 \u4e07\u6761\u65f6&#xff0c;\u907f\u514dlimit 10000, 20&#xff08;\u5168\u8868\u626b\u63cf\u540e\u4e22\u5f03\u524d 10000 \u6761&#xff09;&#xff0c;\u6539\u7528\u8986\u76d6\u7d22\u5f15 &#043; \u5b50\u67e5\u8be2<\/p>\n<p>&#8212; \u4f18\u5316\u524d&#xff08;\u6162&#xff09;<br \/>\nselect * from user limit 10000, 20;<br \/>\n&#8212; \u4f18\u5316\u540e&#xff08;\u5feb&#xff09;&#xff1a;\u5148\u67e5\u4e3b\u952e&#xff0c;\u518d\u5173\u8054\u8be6\u60c5<br \/>\nselect u.* from user u join (select id from user limit 10000, 20) t on u.id &#061; t.id; <\/p>\n<p>\u25cf\u00a0 \u8054\u5408\u7d22\u5f15\u4f18\u5316&#xff1a;\u9ad8\u9891\u67e5\u8be2\u5b57\u6bb5\u7ec4\u5408\u6210\u8054\u5408\u7d22\u5f15&#xff08;\u5982where name&#061;&#039;\u77f3&#039; and age&#061;25&#xff0c;\u5efa\u7acbidx_name_age&#xff09;<\/p>\n<h3 id=\"3%E3%80%81%E6%9E%B6%E6%9E%84%E4%BC%98%E5%8C%96%EF%BC%9A%E4%B8%BB%E4%BB%8E%E5%A4%8D%E5%88%B6%E4%B8%8E%E8%AF%BB%E5%86%99%E5%88%86%E7%A6%BB\">3\u3001\u67b6\u6784\u4f18\u5316&#xff1a;\u4e3b\u4ece\u590d\u5236\u4e0e\u8bfb\u5199\u5206\u79bb<\/h3>\n<p>\u5f53\u5355\u5e93\u6027\u80fd\u8fbe\u5230\u74f6\u9888\u65f6&#xff0c;\u4e3b\u4ece\u590d\u5236 &#043; \u8bfb\u5199\u5206\u79bb\u662f\u9996\u9009\u65b9\u6848&#xff0c;\u817e\u8baf\u4e91 MySQL \u5df2\u5185\u7f6e\u8be5\u80fd\u529b<\/p>\n<p>(1) \u4e3b\u4ece\u590d\u5236\u539f\u7406<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u4e3b\u5e93&#xff08;Master&#xff09;\u63d0\u4ea4\u4e8b\u52a1\u65f6&#xff0c;\u5c06\u6570\u636e\u53d8\u66f4\u8bb0\u5f55\u5230 Binlog<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u4ece\u5e93&#xff08;Slave&#xff09;\u901a\u8fc7 IO \u7ebf\u7a0b\u8bfb\u53d6\u4e3b\u5e93 Binlog&#xff0c;\u5199\u5165\u672c\u5730\u4e2d\u7ee7\u65e5\u5fd7&#xff08;Relay Log&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u4ece\u5e93 SQL \u7ebf\u7a0b\u91cd\u653e\u4e2d\u7ee7\u65e5\u5fd7\u4e2d\u7684\u4e8b\u4ef6&#xff0c;\u540c\u6b65\u4e3b\u5e93\u6570\u636e<\/p>\n<p>(2) \u8bfb\u5199\u5206\u79bb\u4f18\u52bf<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u8bfb\u8bf7\u6c42\u5206\u6d41\u5230\u4ece\u5e93&#xff0c;\u51cf\u8f7b\u4e3b\u5e93\u538b\u529b&#xff08;\u5982\u67e5\u8be2\u3001\u7edf\u8ba1\u64cd\u4f5c\u8d70\u4ece\u5e93&#xff09;<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u4e3b\u5e93\u4e13\u6ce8\u4e8e\u5199\u64cd\u4f5c&#xff08;\u5982\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664&#xff09;&#xff0c;\u63d0\u5347\u5199\u5165\u6027\u80fd<\/p>\n<p>\u00a0 \u00a0 \u00a0\u25cf\u00a0 \u9ad8\u53ef\u7528&#xff1a;\u4e3b\u5e93\u6545\u969c\u65f6&#xff0c;\u4ece\u5e93\u53ef\u5feb\u901f\u5207\u6362\u4e3a\u4e3b\u5e93&#xff0c;\u907f\u514d\u4e1a\u52a1\u4e2d\u65ad<\/p>\n<h3 id=\"4%E3%80%81%E5%88%86%E5%B8%83%E5%BC%8F%E4%BC%98%E5%8C%96%EF%BC%9A%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8\">4\u3001\u5206\u5e03\u5f0f\u4f18\u5316&#xff1a;\u5206\u5e93\u5206\u8868<\/h3>\n<p>\u5f53\u5355\u5e93\u6570\u636e\u91cf\u8d85\u8fc7 1000 \u4e07\u6761\u3001\u5355\u8868\u8d85\u8fc7 500 \u4e07\u6761\u65f6&#xff0c;\u9700\u8fdb\u884c\u5206\u5e93\u5206\u8868&#xff0c;\u5e38\u7528\u65b9\u6848\u5982\u4e0b&#xff1a;<\/p>\n<p>\u25cf\u00a0 \u4e2d\u95f4\u4ef6\u9009\u62e9&#xff1a;MyCat&#xff08;\u5f00\u6e90&#xff09;\u3001\u817e\u8baf\u4e91 TDSQL&#xff08;\u5206\u5e03\u5f0f MySQL&#xff0c;\u65e0\u9700\u624b\u52a8\u5206\u5e93\u5206\u8868&#xff09;<\/p>\n<p>\u25cf\u00a0 \u5206\u7247\u7b56\u7565&#xff1a;\u6309\u4e3b\u952e id \u53d6\u6a21&#xff08;\u5982id % 4\u5206 4 \u4e2a\u5e93&#xff09;&#xff0c;\u9002\u7528\u4e8e\u5747\u5300\u5206\u5e03\u7684\u573a\u666f\u3002<\/p>\n<p>\u25cf\u00a0 \u6ce8\u610f\u4e8b\u9879&#xff1a;<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u907f\u514d\u8de8\u5206\u7247\u67e5\u8be2&#xff08;\u5982where id in (1,5,9)\u53ef\u80fd\u6d89\u53ca\u591a\u4e2a\u5206\u7247&#xff09;\u3002<\/p>\n<p>\u00a0 \u00a0\u00a0\u25cb \u5168\u5c40\u4e3b\u952e\u751f\u6210&#xff1a;\u4f7f\u7528\u81ea\u589e id &#043; \u5206\u7247\u504f\u79fb\u91cf&#xff08;\u5982\u5206\u7247 1 \u7684 id \u4e3a 1-1000 \u4e07&#xff0c;\u5206\u7247 2 \u4e3a 1000 \u4e07<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 &#043; 1-2000 \u4e07&#xff09;\u3002<\/p>\n<h3 id=\"5%E3%80%81%E7%9B%91%E6%8E%A7%E4%B8%8E%E8%AF%8A%E6%96%AD\">5\u3001\u76d1\u63a7\u4e0e\u8bca\u65ad<\/h3>\n<p>\u25cf\u00a0 \u6162\u67e5\u8be2\u65e5\u5fd7&#xff1a;\u5f00\u542f\u6162\u67e5\u8be2\u65e5\u5fd7&#xff08;slow_query_log&#061;1&#xff0c;long_query_time&#061;1\u79d2&#xff09;&#xff0c;\u8bb0\u5f55\u6267\u884c\u65f6<\/p>\n<p>\u00a0 \u00a0\u00a0\u95f4\u8d85\u8fc7 1 \u79d2\u7684 SQL&#xff0c;\u5b9a\u671f\u5206\u6790\u4f18\u5316\u3002<\/p>\n<p>\u25cf\u00a0 \u53ef\u89c6\u5316\u76d1\u63a7&#xff1a;\u4f7f\u7528 Skywalking\u3001Prometheus&#043;Grafana \u76d1\u63a7 SQL \u6267\u884c\u65f6\u95f4\u3001\u7d22\u5f15\u547d\u4e2d\u7387\u3001\u9501\u7b49<\/p>\n<p>\u00a0 \u00a0\u00a0\u5f85\u7b49\u6307\u6807\u3002<\/p>\n<p>\u25cf\u00a0 \u817e\u8baf\u4e91\u5de5\u5177&#xff1a;\u901a\u8fc7\u817e\u8baf\u4e91\u6570\u636e\u5e93\u6027\u80fd\u5206\u6790\u5de5\u5177&#xff0c;\u81ea\u52a8\u8bc6\u522b\u6162 SQL\u3001\u7d22\u5f15\u4f18\u5316\u5efa\u8bae&#xff0c;\u4e00\u952e\u4f18\u5316\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 \u5f15\u8a00<br \/>\n\u4e00\u3001\u903b\u8f91\u67b6\u6784<br \/>\n&#x1f5a5;\ufe0f\u00a0\u5ba2\u6237\u7aef\u5c42<br \/>\n&#x1f9e0;\u00a0MySQL Server \u5c42<br \/>\n&#x1f6e2;\ufe0f\u00a0\u5b58\u50a8\u5f15\u64ce\u5c42<br \/>\n&#x1f4c1;\u00a0\u6587\u4ef6\u7cfb\u7edf\u5c42<br \/>\n\u4e8c\u3001SQL\u67e5\u8be2\u4e0e\u4fee\u6539\u5e95\u5c42\u6267\u884c\u903b\u8f91<br \/>\n\u7b2c\u4e00\u9636\u6bb5&#xff1a;MySQL Server\u5c42\u5904\u7406<br \/>\n1\u3001\u5ba2\u6237\u7aef\u8bf7\u6c42&#xff1a;<br \/>\n2\u3001\u8fde\u63a5\u5668&#xff1a;<br \/>\n3\u3001\u67e5\u8be2\u7f13\u5b58(MySQL8\u5df2\u79fb\u9664)&#xff1a;<br \/>\n4\u3001\u89e3\u6790\u5668&#xff1a;<br \/>\n5\u3001\u9884\u5904\u7406\u5668&#xff1a;<br \/>\n6\u3001\u4f18\u5316\u5668&amp;#xff<\/p>\n","protected":false},"author":2,"featured_media":73319,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[114,100],"topic":[],"class_list":["post-73322","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-mysql","tag-100"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mysql\u5168\u9762\u8be6\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/73322.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mysql\u5168\u9762\u8be6\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u76ee\u5f55 \u5f15\u8a00 \u4e00\u3001\u903b\u8f91\u67b6\u6784 &#x1f5a5;\ufe0f\u00a0\u5ba2\u6237\u7aef\u5c42 &#x1f9e0;\u00a0MySQL Server \u5c42 &#x1f6e2;\ufe0f\u00a0\u5b58\u50a8\u5f15\u64ce\u5c42 &#x1f4c1;\u00a0\u6587\u4ef6\u7cfb\u7edf\u5c42 \u4e8c\u3001SQL\u67e5\u8be2\u4e0e\u4fee\u6539\u5e95\u5c42\u6267\u884c\u903b\u8f91 \u7b2c\u4e00\u9636\u6bb5&#xff1a;MySQL Server\u5c42\u5904\u7406 1\u3001\u5ba2\u6237\u7aef\u8bf7\u6c42&#xff1a; 2\u3001\u8fde\u63a5\u5668&#xff1a; 3\u3001\u67e5\u8be2\u7f13\u5b58(MySQL8\u5df2\u79fb\u9664)&#xff1a; 4\u3001\u89e3\u6790\u5668&#xff1a; 5\u3001\u9884\u5904\u7406\u5668&#xff1a; 6\u3001\u4f18\u5316\u5668&amp;#xff\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/73322.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-07T06:17:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260207061714-6986d8ea6a5d2.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 \u5206\" \/>\n<script type=\"application\/ld+json\" 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