{"id":91501,"date":"2026-08-07T23:15:58","date_gmt":"2026-08-07T15:15:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/91501.html"},"modified":"2026-08-07T23:15:58","modified_gmt":"2026-08-07T15:15:58","slug":"%e3%80%90mysql%e3%80%91mysql%e5%ad%a6%e4%b9%a0%e7%9a%84%e4%b8%80%e5%a4%a7%e9%87%8d%e7%82%b9%ef%bc%9a%e8%a7%86%e5%9b%be","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/91501.html","title":{"rendered":"\u3010MYSQL\u3011MYSQL\u5b66\u4e60\u7684\u4e00\u5927\u91cd\u70b9\uff1a\u89c6\u56fe"},"content":{"rendered":"<p> <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260807151556-6a75f6aca770c.png\" width=\"200\" height=\"200\" alt=\"\u5934\u50cf\" \/> <\/p>\n<p> <font color=\"#c0392b\">&#x1f3ac; \u4e2a\u4eba\u4e3b\u9875&#xff1a;\u827e\u8389\u4e1d\u52aa\u529b\u7ec3\u5251<\/font> <\/p>\n<p> <font color=\"#3498db\">\u2744\u4e13\u680f\u4f20\u9001\u95e8&#xff1a;\u300aC\u8bed\u8a00\u300b\u300a\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u300b\u300aC\/C&#043;&#043;\u5e72\u8d27\u5206\u4eab&amp;\u5b66\u4e60\u8fc7\u7a0b\u8bb0\u5f55\u300b \u300aLinux\u64cd\u4f5c\u7cfb\u7edf\u7f16\u7a0b\u8be6\u89e3\u300b\u300a\u7b14\u8bd5\/\u9762\u8bd5\u5e38\u89c1\u7b97\u6cd5&#xff1a;\u4ece\u57fa\u7840\u5230\u8fdb\u9636\u300b\u300aPython\u5e72\u8d27\u5206\u4eab\u300b<\/font> <\/p>\n<p> <font color=\"7B68EE\" size=\"4\">\u2b50\ufe0f\u4e3a\u5929\u5730\u7acb\u5fc3&#xff0c;\u4e3a\u751f\u6c11\u7acb\u547d&#xff0c;\u4e3a\u5f80\u5723\u7ee7\u7edd\u5b66&#xff0c;\u4e3a\u4e07\u4e16\u5f00\u592a\u5e73 <\/font> <\/p>\n<hr \/>\n<p><font color=\"#c0392b\" size=\"4\">&#x1f3ac; \u827e\u8389\u4e1d\u7684\u7b80\u4ecb&#xff1a;<\/font><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260807151556-6a75f6acc6ccd.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>0 ~&gt; \u524d\u7f6e\u6982\u5ff5\u8fa8\u6790<\/li>\n<li>\n<ul>\n<li>0.1 \u4e24\u4e2a \u201c\u89c6\u56fe\u201d \u7684\u672c\u8d28\u533a\u5206<\/li>\n<\/ul>\n<\/li>\n<li>1 ~&gt; \u89c6\u56fe\u57fa\u7840\u6982\u5ff5<\/li>\n<li>\n<ul>\n<li>1.1 \u6838\u5fc3\u5b9a\u4e49<\/li>\n<li>\n<ul>\n<li>1.1.1 \u6613\u9519\u95ee\u9898<\/li>\n<\/ul>\n<\/li>\n<li>1.2 \u57fa\u8868\u4e0e\u89c6\u56fe\u7684\u8054\u52a8\u5173\u7cfb<\/li>\n<li>\n<ul>\n<li>1.2.1 \u7ea0\u6b63<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>2 ~&gt; \u89c6\u56fe\u57fa\u672c\u64cd\u4f5c<\/li>\n<li>\n<ul>\n<li>2.1 \u521b\u5efa\u89c6\u56fe<\/li>\n<li>\n<ul>\n<li>2.1.1 \u6807\u51c6\u8bed\u6cd5<\/li>\n<li>2.1.2 \u793a\u4f8b<\/li>\n<\/ul>\n<\/li>\n<li>2.2 \u67e5\u8be2\u89c6\u56fe<\/li>\n<li>2.3 \u89c6\u56fe\u6570\u636e\u4fee\u6539<\/li>\n<li>\n<ul>\n<li>2.3.1 \u901a\u8fc7\u89c6\u56fe\u4fee\u6539\u57fa\u8868<\/li>\n<li>2.3.2 \u4fee\u6539\u57fa\u8868\u540c\u6b65\u5230\u89c6\u56fe<\/li>\n<li>2.3.3 \u53ef\u66f4\u65b0\u89c6\u56fe\u7684\u6838\u5fc3\u7ea6\u675f<\/li>\n<\/ul>\n<\/li>\n<li>2.4 \u5220\u9664\u89c6\u56fe<\/li>\n<li>\n<ul>\n<li>2.4.1 \u6807\u51c6\u8bed\u6cd5<\/li>\n<li>2.4.2 \u793a\u4f8b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>3 ~&gt; \u89c6\u56fe\u89c4\u5219\u4e0e\u4f7f\u7528\u9650\u5236<\/li>\n<li>4 ~&gt; \u5de5\u7a0b\u5b9e\u8df5\u4e0e\u884c\u4e1a\u73b0\u72b6<\/li>\n<li>\n<ul>\n<li>4.1 \u89c6\u56fe\u7684\u6838\u5fc3\u4ef7\u503c<\/li>\n<li>4.2 \u5927\u5382\u4f7f\u7528\u89c4\u8303<\/li>\n<\/ul>\n<\/li>\n<li>5 ~&gt; \u5b9e\u6218\u4f8b\u9898<\/li>\n<li>\n<ul>\n<li>5.1 \u9898\u76ee<\/li>\n<li>5.2 \u6807\u51c6\u89e3\u7b54<\/li>\n<\/ul>\n<\/li>\n<li>\u7ed3\u5c3e<\/li>\n<\/ul>\n<hr \/>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260807151557-6a75f6ad2baed.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>0 ~&gt; \u524d\u7f6e\u6982\u5ff5\u8fa8\u6790<\/h2>\n<h3>0.1 \u4e24\u4e2a \u201c\u89c6\u56fe\u201d \u7684\u672c\u8d28\u533a\u5206<\/h3>\n<p>\u660e\u786e\u5f3a\u8c03\u4e8c\u8005\u65e0\u4efb\u4f55\u5173\u8054&#xff0c;\u66f4\u52a0\u7cbe\u51c6\u7684\u5b9a\u4e49\u5982\u4e0b&#xff1a;<\/p>\n<ul>\n<li>\u672c\u6587\u7684\u89c6\u56fe&#xff08;View&#xff09;&#xff1a;\u6570\u636e\u5e93\u6a21\u5f0f\u5c42\u9762\u7684\u5bf9\u8c61&#xff0c;\u662f\u4e00\u6bb5\u88ab\u547d\u540d\u5b58\u50a8\u7684 SELECT \u67e5\u8be2\u5b9a\u4e49&#xff0c;\u4ee5\u865a\u62df\u8868\u7684\u5f62\u5f0f\u5bf9\u5916\u63d0\u4f9b\u8bbf\u95ee\u80fd\u529b&#xff0c;\u5c5e\u4e8e SQL \u6807\u51c6\u8bed\u6cd5\u8303\u7574\u3002<\/li>\n<li>\u4e8b\u52a1\u4e2d\u7684 Read View&#xff1a;InnoDB \u5f15\u64ce MVCC \u673a\u5236\u7684\u5e95\u5c42\u7ec4\u4ef6&#xff0c;\u662f\u4e8b\u52a1\u6267\u884c\u5feb\u7167\u8bfb\u65f6\u751f\u6210\u7684\u53ef\u89c1\u6027\u5224\u65ad\u5feb\u7167&#xff0c;\u7528\u4e8e\u5224\u5b9a\u5f53\u524d\u4e8b\u52a1\u80fd\u770b\u5230\u54ea\u4e9b\u7248\u672c\u7684\u884c\u6570\u636e&#xff0c;\u5c5e\u4e8e\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u7684\u5185\u90e8\u5b9e\u73b0\u903b\u8f91\u3002<\/li>\n<\/ul>\n<p>\u4e8c\u8005\u5206\u5c5e\u5b8c\u5168\u4e0d\u540c\u7684\u6280\u672f\u7ef4\u5ea6&#xff0c;\u6ca1\u6709\u4efb\u4f55\u5173\u8054\u3002<\/p>\n<hr \/>\n<h2>1 ~&gt; \u89c6\u56fe\u57fa\u7840\u6982\u5ff5<\/h2>\n<h3>1.1 \u6838\u5fc3\u5b9a\u4e49<\/h3>\n<p>\u89c6\u56fe\u662f\u4e00\u4e2a\u865a\u62df\u8868&#xff0c;\u5176\u5185\u5bb9\u7531\u67e5\u8be2\u5b9a\u4e49&#xff0c;\u540c\u771f\u5b9e\u8868\u4e00\u6837\u5305\u542b\u547d\u540d\u7684\u5217\u548c\u884c\u6570\u636e\u3002<\/p>\n<h4>1.1.1 \u6613\u9519\u95ee\u9898<\/h4>\n<p>\u5982\u4e0b\u6240\u793a&#xff1a;<\/p>\n<li>\u201c\u5728\u5185\u5b58\u7ea7\u522b\u4e0a\u521b\u5efa\u597d\u4e86\u4e00\u5f20\u8868\u201d\u201c\u628a\u7b5b\u9009\u51fa\u6765\u7684\u6570\u636e\u63d2\u5165\u5230\u8868\u4e2d\u201d\u201c\u67e5\u8be2\u7ed3\u679c\u53d8\u6210\u4e86\u4e00\u4e2a\u4e34\u65f6\u8868\u7ed3\u6784\u201d\n<li>\u89c6\u56fe\u672c\u8eab\u4e0d\u5b58\u50a8\u4efb\u4f55\u6570\u636e&#xff0c;\u4e5f\u4e0d\u4f1a\u9ed8\u8ba4\u751f\u6210\u5185\u5b58\u4e34\u65f6\u8868\u3002\u89c6\u56fe\u7684\u672c\u8d28\u662f\u4e00\u6bb5\u88ab\u6301\u4e45\u5316\u5b58\u50a8\u7684 SELECT \u67e5\u8be2\u8bed\u53e5\u3002\u5f53\u67e5\u8be2\u89c6\u56fe\u65f6&#xff0c;MySQL \u4f1a\u5c06\u89c6\u56fe\u5b9a\u4e49\u4e0e\u5916\u5c42\u67e5\u8be2\u5408\u5e76\u540e\u6267\u884c&#xff0c;\u6240\u6709\u6570\u636e\u5747\u5b9e\u65f6\u4ece\u57fa\u8868\u8ba1\u7b97\u5f97\u5230\u3002<\/li>\n<li>\u8865\u5145\u6267\u884c\u7b97\u6cd5&#xff1a;\n<ul>\n<li>MERGE \u5408\u5e76\u7b97\u6cd5&#xff08;\u9ed8\u8ba4\u4f18\u5148&#xff09;&#xff1a;\u5c06\u89c6\u56fe\u5b9a\u4e49\u7684 SQL \u4e0e\u5916\u5c42\u67e5\u8be2 SQL \u5408\u5e76\u4e3a\u5355\u6761\u8bed\u53e5\u6267\u884c&#xff0c;\u65e0\u989d\u5916\u4e34\u65f6\u8868\u5f00\u9500&#xff0c;\u6027\u80fd\u7b49\u4ef7\u4e8e\u76f4\u63a5\u6267\u884c\u539f\u751f\u67e5\u8be2\u3002<\/li>\n<li>TEMPTABLE \u4e34\u65f6\u8868\u7b97\u6cd5&#xff1a;\u5f53\u89c6\u56fe\u5b9a\u4e49\u5305\u542b\u805a\u5408\u3001\u5206\u7ec4\u3001DISTINCT \u7b49\u65e0\u6cd5\u5408\u5e76\u7684\u903b\u8f91\u65f6&#xff0c;MySQL \u5148\u5c06\u89c6\u56fe\u67e5\u8be2\u7ed3\u679c\u5199\u5165\u4e34\u65f6\u8868&#xff08;\u5185\u5b58\u6216\u78c1\u76d8&#xff09;&#xff0c;\u518d\u57fa\u4e8e\u4e34\u65f6\u8868\u6267\u884c\u5916\u5c42\u67e5\u8be2&#xff0c;\u5b58\u5728\u989d\u5916\u6027\u80fd\u5f00\u9500\u3002<\/li>\n<\/ul>\n<\/li>\n<\/li>\n<li>\u201c\u89c6\u56fe\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u79cd\u8868\u7ed3\u6784\u201d\n<li>\u89c6\u56fe\u662f\u865a\u62df\u8868&#xff0c;\u4ec5\u5b58\u50a8\u5b9a\u4e49\u5143\u6570\u636e&#xff08;MySQL 5.x \u5b58 .frm \u7ed3\u6784\u6587\u4ef6&#xff0c;8.0 \u540e\u7eb3\u5165\u6570\u636e\u5b57\u5178&#xff09;&#xff0c;\u6ca1\u6709\u5bf9\u5e94\u7684 .ibd \u6570\u636e\u6587\u4ef6&#xff0c;\u4e0d\u6301\u4e45\u5316\u5b58\u50a8\u884c\u6570\u636e&#xff0c;\u4e0e\u7269\u7406\u57fa\u8868\u6709\u672c\u8d28\u533a\u522b\u3002\u5220\u9664\u89c6\u56fe\u540e\u65e0\u5bf9\u5e94\u6570\u636e\u6587\u4ef6&#xff0c;\u4e5f\u5370\u8bc1\u4e86\u8fd9\u4e00\u70b9\u3002<\/li>\n<\/li>\n<h3>1.2 \u57fa\u8868\u4e0e\u89c6\u56fe\u7684\u8054\u52a8\u5173\u7cfb<\/h3>\n<p>\u8fd9\u4e2a\u8868\u8ff0\u5bf9\u5417&#xff1a;\u89c6\u56fe\u7684\u6570\u636e\u53d8\u5316\u4f1a\u5f71\u54cd\u57fa\u8868&#xff0c;\u57fa\u8868\u7684\u6570\u636e\u53d8\u5316\u4e5f\u4f1a\u5f71\u54cd\u89c6\u56fe\u3002<\/p>\n<h4>1.2.1 \u7ea0\u6b63<\/h4>\n<p>\u5b9e\u9645\u4e0a\u8be5\u7ed3\u8bba\u5b58\u5728\u524d\u63d0\u7f3a\u5931&#xff0c;\u5b8c\u6574\u4e25\u8c28\u7684\u8868\u8ff0\u4e3a&#xff1a;<\/p>\n<li>\u57fa\u8868\u53d8\u66f4 \u2192 \u89c6\u56fe\u540c\u6b65\u53d8\u66f4&#xff1a;\u6052\u6210\u7acb\u3002\u89c6\u56fe\u6570\u636e\u662f\u67e5\u8be2\u65f6\u5b9e\u65f6\u8ba1\u7b97\u751f\u6210&#xff0c;\u57fa\u8868\u6570\u636e\u53d8\u66f4\u540e&#xff0c;\u518d\u6b21\u67e5\u8be2\u89c6\u56fe\u5fc5\u7136\u53cd\u6620\u6700\u65b0\u6570\u636e\u3002<\/li>\n<li>\u89c6\u56fe\u53d8\u66f4 \u2192 \u57fa\u8868\u540c\u6b65\u53d8\u66f4&#xff1a;\u4ec5\u53ef\u66f4\u65b0\u89c6\u56fe\u652f\u6301&#xff0c;\u4e14\u5b58\u5728\u4e25\u683c\u7684\u8bed\u6cd5\u7ea6\u675f\u3002\u7edd\u5927\u591a\u6570\u590d\u6742\u89c6\u56fe&#xff08;\u805a\u5408\u3001\u591a\u8868\u6df1\u5ea6\u8fde\u63a5\u7b49&#xff09;\u65e0\u6cd5\u6267\u884c\u5199\u5165\u64cd\u4f5c\u3002<\/li>\n<hr \/>\n<h2>2 ~&gt; \u89c6\u56fe\u57fa\u672c\u64cd\u4f5c<\/h2>\n<h3>2.1 \u521b\u5efa\u89c6\u56fe<\/h3>\n<h4>2.1.1 \u6807\u51c6\u8bed\u6cd5<\/h4>\n<p>create view\u89c6\u56fe\u540das select\u8bed\u53e5;\u5b58\u5728\u7a7a\u683c\u7f3a\u5931\u95ee\u9898&#xff0c;\u6807\u51c6\u8bed\u6cd5\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token keyword\">CREATE<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token operator\">OR<\/span> <span class=\"token keyword\">REPLACE<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">VIEW<\/span> \u89c6\u56fe\u540d <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">(<\/span>\u81ea\u5b9a\u4e49\u5217\u540d\u5217\u8868<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token keyword\">AS<\/span> <span class=\"token keyword\">SELECT<\/span> \u67e5\u8be2\u8bed\u53e5<br \/>\n<span class=\"token punctuation\">[<\/span><span class=\"token keyword\">WITH<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token keyword\">CASCADED<\/span> <span class=\"token operator\">|<\/span> <span class=\"token keyword\">LOCAL<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">CHECK<\/span> <span class=\"token keyword\">OPTION<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5173\u952e\u5b57\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>OR REPLACE&#xff1a;\u89c6\u56fe\u5df2\u5b58\u5728\u65f6\u76f4\u63a5\u8986\u76d6\u539f\u6709\u5b9a\u4e49&#xff0c;\u907f\u514d\u91cd\u540d\u62a5\u9519\u3002<\/li>\n<li>\u81ea\u5b9a\u4e49\u5217\u540d\u5217\u8868&#xff1a;\u53ef\u91cd\u547d\u540d\u89c6\u56fe\u7684\u8f93\u51fa\u5217&#xff0c;\u6570\u91cf\u5fc5\u987b\u4e0e SELECT \u7ed3\u679c\u5217\u6570\u4e00\u81f4&#xff1b;\u4e0d\u6307\u5b9a\u5219\u9ed8\u8ba4\u6cbf\u7528 SELECT \u7684\u5217\u540d\u3002<\/li>\n<li>WITH CHECK OPTION&#xff1a;\u5199\u5165\u89c6\u56fe\u6570\u636e\u65f6\u6821\u9a8c\u6570\u636e\u662f\u5426\u6ee1\u8db3\u89c6\u56fe\u7684 WHERE \u8fc7\u6ee4\u6761\u4ef6&#xff0c;\u9632\u6b62\u5199\u5165\u540e\u6570\u636e\u4ece\u89c6\u56fe\u4e2d \u201c\u6d88\u5931\u201d\u3002<\/li>\n<\/ul>\n<h4>2.1.2 \u793a\u4f8b<\/h4>\n<p>\u57fa\u4e8e EMP\u3001DEPT \u8868\u521b\u5efa\u5458\u5de5\u59d3\u540d &#8211; \u90e8\u95e8\u540d\u79f0\u89c6\u56fe\u3002<\/p>\n<p><span class=\"token comment\">&#8212; \u521b\u5efa\u5185\u8fde\u63a5\u89c6\u56fe<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">VIEW<\/span> v_ename_dname <span class=\"token keyword\">AS<\/span><br \/>\n<span class=\"token keyword\">SELECT<\/span> emp<span class=\"token punctuation\">.<\/span>ename<span class=\"token punctuation\">,<\/span> dept<span class=\"token punctuation\">.<\/span>dname<br \/>\n<span class=\"token keyword\">FROM<\/span> emp<br \/>\n<span class=\"token keyword\">INNER<\/span> <span class=\"token keyword\">JOIN<\/span> dept <span class=\"token keyword\">ON<\/span> emp<span class=\"token punctuation\">.<\/span>deptno <span class=\"token operator\">&#061;<\/span> dept<span class=\"token punctuation\">.<\/span>deptno<span class=\"token punctuation\">;<\/span><\/p>\n<h3>2.2 \u67e5\u8be2\u89c6\u56fe<\/h3>\n<p>\u89c6\u56fe\u7684\u67e5\u8be2\u8bed\u6cd5\u4e0e\u666e\u901a\u7269\u7406\u8868\u5b8c\u5168\u4e00\u81f4&#xff0c;\u652f\u6301 WHERE\u3001ORDER BY\u3001\u8054\u8868\u7b49\u6240\u6709\u67e5\u8be2\u8bed\u6cd5\u3002<\/p>\n<p><span class=\"token comment\">&#8212; \u67e5\u8be2\u89c6\u56fe\u5e76\u6309\u90e8\u95e8\u6392\u5e8f<\/span><br \/>\n<span class=\"token keyword\">SELECT<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">FROM<\/span> v_ename_dname <span class=\"token keyword\">ORDER<\/span> <span class=\"token keyword\">BY<\/span> dname<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6267\u884c\u903b\u8f91\u7b49\u4ef7\u4e8e\u76f4\u63a5\u8fd0\u884c\u89c6\u56fe\u5b9a\u4e49\u7684\u5b8c\u6574 SELECT \u8bed\u53e5\u3002<\/p>\n<h3>2.3 \u89c6\u56fe\u6570\u636e\u4fee\u6539<\/h3>\n<h4>2.3.1 \u901a\u8fc7\u89c6\u56fe\u4fee\u6539\u57fa\u8868<\/h4>\n<p>\u793a\u4f8b&#xff1a;\u66f4\u65b0\u89c6\u56fe\u4e2d\u7684\u5458\u5de5\u59d3\u540d&#xff0c;\u57fa\u8868\u540c\u6b65\u53d8\u66f4\u3002<\/p>\n<p><span class=\"token comment\">&#8212; \u901a\u8fc7\u89c6\u56fe\u66f4\u65b0\u5458\u5de5\u59d3\u540d<\/span><br \/>\n<span class=\"token keyword\">UPDATE<\/span> v_ename_dname <span class=\"token keyword\">SET<\/span> ename <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;smith&#039;<\/span> <span class=\"token keyword\">WHERE<\/span> ename <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;SMITH&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u6267\u884c\u7ed3\u679c&#xff1a;\u89c6\u56fe\u4e0e\u57fa\u8868 emp \u7684 ename \u5b57\u6bb5\u540c\u6b65\u66f4\u65b0\u3002<\/li>\n<li>\u6210\u7acb\u524d\u63d0&#xff1a;ename \u5217\u552f\u4e00\u6765\u81ea\u5355\u8868 emp&#xff0c;\u4e14\u89c6\u56fe\u6ee1\u8db3\u53ef\u66f4\u65b0\u6761\u4ef6&#xff1b;\u82e5\u5c1d\u8bd5\u66f4\u65b0 dname&#xff08;\u6765\u81ea dept \u8868&#xff09;&#xff0c;\u591a\u8868\u8fde\u63a5\u89c6\u56fe\u901a\u5e38\u4e0d\u652f\u6301\u8de8\u8868\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<h4>2.3.2 \u4fee\u6539\u57fa\u8868\u540c\u6b65\u5230\u89c6\u56fe<\/h4>\n<p>\u793a\u4f8b&#xff1a;\u66f4\u65b0\u57fa\u8868\u90e8\u95e8\u540d\u79f0&#xff0c;\u89c6\u56fe\u6570\u636e\u540c\u6b65\u53d8\u66f4\u3002<\/p>\n<p><span class=\"token comment\">&#8212; \u4fee\u6539\u57fa\u8868 DEPT \u7684\u90e8\u95e8\u540d\u79f0<\/span><br \/>\n<span class=\"token keyword\">UPDATE<\/span> dept <span class=\"token keyword\">SET<\/span> dname <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;aaaaa&#039;<\/span> <span class=\"token keyword\">WHERE<\/span> deptno <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u6267\u884c\u7ed3\u679c&#xff1a;\u518d\u6b21\u67e5\u8be2\u89c6\u56fe&#xff0c;\u6240\u6709 30 \u53f7\u90e8\u95e8\u5bf9\u5e94\u7684 dname \u540c\u6b65\u66f4\u65b0\u3002<\/li>\n<li>\u7ed3\u8bba&#xff1a;\u57fa\u8868\u6570\u636e\u53d8\u66f4\u5fc5\u7136\u5b9e\u65f6\u53cd\u6620\u5230\u89c6\u56fe\u4e2d&#xff0c;\u65e0\u4efb\u4f55\u524d\u63d0\u6761\u4ef6\u3002<\/li>\n<\/ul>\n<h4>2.3.3 \u53ef\u66f4\u65b0\u89c6\u56fe\u7684\u6838\u5fc3\u7ea6\u675f<\/h4>\n<p>\u8865\u5145\u5de5\u4e1a\u754c\u6807\u51c6\u7ea6\u675f\u3002<\/p>\n<p>\u89c6\u56fe\u652f\u6301 UPDATE\/INSERT\/DELETE \u5fc5\u987b\u540c\u65f6\u6ee1\u8db3&#xff1a;<\/p>\n<ul>\n<li>\u65e0\u805a\u5408\u51fd\u6570&#xff08;SUM\/COUNT\/MAX \u7b49&#xff09;\u3001\u65e0 GROUP BY\u3001\u65e0 DISTINCT\u3001\u65e0 UNION\u3001\u65e0 HAVING\u3002<\/li>\n<li>\u89c6\u56fe\u5217\u4e0d\u80fd\u662f\u8868\u8fbe\u5f0f\u3001\u5e38\u91cf\u6216\u51fd\u6570\u8ba1\u7b97\u7684\u7ed3\u679c\u3002<\/li>\n<li>\u5355\u8868\u89c6\u56fe\u5929\u7136\u652f\u6301\u66f4\u65b0&#xff1b;\u591a\u8868\u8fde\u63a5\u89c6\u56fe\u4ec5\u5141\u8bb8\u66f4\u65b0\u5176\u4e2d\u4e00\u5f20\u57fa\u8868\u7684\u5217&#xff0c;\u4e14\u8fde\u63a5\u4e0d\u80fd\u5bfc\u81f4\u884c\u6620\u5c04\u6b67\u4e49\u3002<\/li>\n<li>FROM \u5b50\u53e5\u4e2d\u4e0d\u80fd\u5305\u542b\u5b50\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<h3>2.4 \u5220\u9664\u89c6\u56fe<\/h3>\n<h4>2.4.1 \u6807\u51c6\u8bed\u6cd5<\/h4>\n<p><span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">VIEW<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token keyword\">IF<\/span> <span class=\"token keyword\">EXISTS<\/span><span class=\"token punctuation\">]<\/span> \u89c6\u56fe\u540d<span class=\"token punctuation\">;<\/span><\/p>\n<h4>2.4.2 \u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">VIEW<\/span> v_ename_dname<span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u6267\u884c\u540e\u4ec5\u5220\u9664\u89c6\u56fe\u7684\u5b9a\u4e49\u5143\u6570\u636e&#xff0c;\u4e0d\u4f1a\u5bf9\u57fa\u8868\u6570\u636e\u4ea7\u751f\u4efb\u4f55\u5f71\u54cd\u3002<\/li>\n<li>\u7269\u7406\u5c42\u9762&#xff1a;\u5220\u9664\u89c6\u56fe\u4e0d\u4f1a\u5220\u9664\u4efb\u4f55 .ibd \u6570\u636e\u6587\u4ef6&#xff0c;\u4ec5\u79fb\u9664\u5bf9\u5e94\u7684\u89c6\u56fe\u5b9a\u4e49\u6587\u4ef6\u3002<\/li>\n<\/ul>\n<hr \/>\n<h2>3 ~&gt; \u89c6\u56fe\u89c4\u5219\u4e0e\u4f7f\u7528\u9650\u5236<\/h2>\n<li>\u547d\u540d\u552f\u4e00\u6027&#xff1a;\u540c\u4e00\u6570\u636e\u5e93\u5185&#xff0c;\u89c6\u56fe\u540d\u4e0d\u80fd\u4e0e\u8868\u540d\u3001\u5176\u4ed6\u89c6\u56fe\u540d\u91cd\u590d\u3002<\/li>\n<li>\u521b\u5efa\u6570\u91cf\u65e0\u4e0a\u9650&#xff1a;\u4f46\u590d\u6742\u67e5\u8be2\u5b9a\u4e49\u7684\u89c6\u56fe\u4f1a\u589e\u52a0\u4f18\u5316\u5668\u89e3\u6790\u6210\u672c&#xff0c;\u53ef\u80fd\u5bfc\u81f4\u6267\u884c\u8ba1\u5212\u9000\u5316&#xff0c;\u4e0d\u5efa\u8bae\u6ee5\u7528\u3002<\/li>\n<li>\u529f\u80fd\u9650\u5236&#xff1a;\u666e\u901a\u89c6\u56fe\u65e0\u6cd5\u521b\u5efa\u7d22\u5f15&#xff0c;\u65e0\u6cd5\u5173\u8054\u89e6\u53d1\u5668&#xff0c;\u4e0d\u80fd\u4e3a\u5217\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u3002\n<li>\u6ce8&#xff1a;MySQL \u539f\u751f\u4e0d\u652f\u6301\u7269\u5316\u89c6\u56fe&#xff0c;\u65e0\u6cd5\u4e3a\u89c6\u56fe\u6301\u4e45\u5316\u5b58\u50a8\u6570\u636e\u4e0e\u7d22\u5f15&#xff1b;\u82e5\u9700\u7269\u5316\u89c6\u56fe\u9700\u901a\u8fc7\u5b9a\u65f6\u4efb\u52a1\u751f\u6210\u7269\u7406\u8868\u624b\u52a8\u6a21\u62df\u3002<\/li>\n<\/li>\n<li>\u6743\u9650\u89c4\u5219&#xff1a;\u8bbf\u95ee\u89c6\u56fe\u9700\u8981\u62e5\u6709\u89c6\u56fe\u7684\u5bf9\u5e94\u6743\u9650&#xff0c;\u540c\u65f6\u89c6\u56fe\u521b\u5efa\u8005\u5fc5\u987b\u62e5\u6709\u57fa\u8868\u7684\u67e5\u8be2\u6743\u9650\u3002\u89c6\u56fe\u53ef\u5b9e\u73b0\u5217\u7ea7\u6743\u9650\u63a7\u5236&#xff0c;\u53ea\u5411\u7528\u6237\u5f00\u653e\u5141\u8bb8\u67e5\u770b\u7684\u5b57\u6bb5\u3002<\/li>\n<li>\u6392\u5e8f\u8986\u76d6\u89c4\u5219&#xff1a;\u89c6\u56fe\u5b9a\u4e49\u4e2d\u53ef\u4ee5\u5199 ORDER BY&#xff0c;\u4f46\u5982\u679c\u67e5\u8be2\u89c6\u56fe\u7684\u5916\u5c42\u8bed\u53e5\u4e5f\u5305\u542b ORDER BY&#xff0c;\u89c6\u56fe\u5185\u90e8\u7684\u6392\u5e8f\u4f1a\u88ab\u5916\u5c42\u8986\u76d6&#xff0c;\u6700\u7ec8\u4ee5\u5916\u5c42\u6392\u5e8f\u4e3a\u51c6\u3002<\/li>\n<li>\u8054\u8868\u517c\u5bb9\u6027&#xff1a;\u89c6\u56fe\u53ef\u4e0e\u666e\u901a\u7269\u7406\u8868\u6df7\u5408\u4f7f\u7528&#xff0c;\u652f\u6301\u5185\u8fde\u63a5\u3001\u5916\u8fde\u63a5\u3001\u5b50\u67e5\u8be2\u7b49\u6240\u6709\u8868\u7ea7\u67e5\u8be2\u8bed\u6cd5\u3002<\/li>\n<hr \/>\n<h2>4 ~&gt; \u5de5\u7a0b\u5b9e\u8df5\u4e0e\u884c\u4e1a\u73b0\u72b6<\/h2>\n<h3>4.1 \u89c6\u56fe\u7684\u6838\u5fc3\u4ef7\u503c<\/h3>\n<p>\u5224\u65ad\u4e00\u4e0b&#xff0c;\u4e0b\u9762\u8fd9\u53e5\u8bdd\u7684\u8868\u8ff0\u6709\u6ca1\u6709\u95ee\u9898&#xff1a;\u201c\u9ad8\u9891\u8bbf\u95ee\u4e0d\u7528\u505a\u591a\u8868\u67e5\u8be2\u3001\u5b57\u6bb5\u66f4\u6e05\u6670\u201d\u3002<\/p>\n<p>\u8fd9\u53e5\u8bdd\u662f\u6709\u95ee\u9898\u7684&#xff0c;\u4e0b\u9762\u7ea0\u6b63\u4e00\u4e0b&#xff1a;<\/p>\n<li>SQL \u590d\u7528\u4e0e\u7b80\u5316&#xff1a;\u5c06\u590d\u6742\u591a\u8868\u5173\u8054\u5c01\u88c5\u4e3a\u89c6\u56fe&#xff0c;\u4e1a\u52a1\u5c42\u76f4\u63a5\u8c03\u7528&#xff0c;\u907f\u514d\u91cd\u590d\u7f16\u5199\u5197\u4f59 SQL&#xff0c;\u964d\u4f4e\u7ef4\u62a4\u6210\u672c\u3002<\/li>\n<li>\u903b\u8f91\u89e3\u8026&#xff1a;\u57fa\u8868\u7ed3\u6784\u53d8\u66f4\u65f6&#xff0c;\u53ef\u901a\u8fc7\u4fee\u6539\u89c6\u56fe\u5b9a\u4e49\u5c4f\u853d\u5e95\u5c42\u53d8\u5316&#xff0c;\u4e0a\u5c42\u4e1a\u52a1\u4ee3\u7801\u65e0\u9700\u6539\u9020\u3002<\/li>\n<li>\u6570\u636e\u5b89\u5168&#xff1a;\u5b9e\u73b0\u884c\u5217\u7ea7\u6743\u9650\u9694\u79bb&#xff0c;\u4f8b\u5982\u53ea\u5f00\u653e\u5458\u5de5\u59d3\u540d\u3001\u90e8\u95e8\u5b57\u6bb5&#xff0c;\u9690\u85cf\u85aa\u8d44\u3001\u8eab\u4efd\u8bc1\u7b49\u654f\u611f\u6570\u636e\u3002<\/li>\n<li>\u6027\u80fd\u8bef\u533a\u4fee\u6b63&#xff1a;\u89c6\u56fe\u4e0d\u4f1a\u63d0\u5347\u67e5\u8be2\u6027\u80fd\u3002MERGE \u7b97\u6cd5\u4e0b\u6027\u80fd\u4e0e\u539f\u751f SQL \u5b8c\u5168\u7b49\u4ef7&#xff1b;TEMPTABLE \u7b97\u6cd5\u4e0b\u53cd\u800c\u4f1a\u589e\u52a0\u4e34\u65f6\u8868\u5f00\u9500&#xff0c;\u6027\u80fd\u4e0b\u964d\u3002\u539f\u59cb\u7b14\u8bb0\u4e2d \u201c\u65b9\u4fbf\u5feb\u901f\u8bfb\u53d6\u201d \u6307\u7684\u662f\u7f16\u5199\u4fbf\u6377&#xff0c;\u800c\u975e\u6267\u884c\u6027\u80fd\u63d0\u5347\u3002<\/li>\n<h3>4.2 \u5927\u5382\u4f7f\u7528\u89c4\u8303<\/h3>\n<p>\u4e92\u8054\u7f51\u884c\u4e1a\u666e\u904d\u73b0\u72b6&#xff0c;\u5927\u5382\u5185\u90e8\u9650\u5236\u4f7f\u7528\u89c6\u56fe&#xff0c;\u6838\u5fc3\u539f\u56e0\u5982\u4e0b&#xff1a;<\/p>\n<li>\u8fd0\u7ef4\u6210\u672c\u9ad8&#xff1a;\u4e1a\u52a1\u903b\u8f91\u4e0b\u6c89\u5230\u6570\u636e\u5e93\u5c42&#xff0c;\u589e\u52a0\u4e86 SQL \u6392\u67e5\u3001\u4f18\u5316\u7684\u590d\u6742\u5ea6&#xff0c;\u4e0d\u5229\u4e8e DBA \u7edf\u4e00\u7ba1\u63a7\u3002<\/li>\n<li>\u67b6\u6784\u6269\u5c55\u6027\u5dee&#xff1a;\u5206\u5e93\u5206\u8868\u3001\u8bfb\u5199\u5206\u79bb\u7684\u5206\u5e03\u5f0f\u67b6\u6784\u4e0b&#xff0c;\u89c6\u56fe\u57fa\u672c\u65e0\u6cd5\u6b63\u5e38\u4f7f\u7528\u3002<\/li>\n<li>\u7814\u53d1\u89c4\u8303\u7ea6\u675f&#xff1a;\u4e3b\u6d41\u7814\u53d1\u89c4\u8303\u8981\u6c42\u4e1a\u52a1\u903b\u8f91\u5168\u90e8\u6536\u655b\u5728\u5e94\u7528\u4ee3\u7801\u5c42&#xff0c;\u6570\u636e\u5e93\u4ec5\u8d1f\u8d23\u6570\u636e\u5b58\u50a8&#xff0c;\u907f\u514d\u6570\u636e\u5e93\u903b\u8f91\u8fc7\u91cd\u5bfc\u81f4\u6574\u4f53\u67b6\u6784\u50f5\u5316\u3002<\/li>\n<li>\u5b66\u4e60\u5efa\u8bae&#xff1a;\u89c6\u56fe\u662f SQL \u6807\u51c6\u6838\u5fc3\u6982\u5ff5&#xff0c;\u5fc5\u987b\u638c\u63e1\u5176\u539f\u7406\u4e0e\u8bed\u6cd5&#xff1b;\u751f\u4ea7\u73af\u5883\u9700\u8c28\u614e\u8bc4\u4f30&#xff0c;\u4f18\u5148\u5728\u4e1a\u52a1\u4ee3\u7801\u5c42\u5c01\u88c5\u67e5\u8be2\u903b\u8f91\u3002<\/li>\n<hr \/>\n<h2>5 ~&gt; \u5b9e\u6218\u4f8b\u9898<\/h2>\n<h3>5.1 \u9898\u76ee<\/h3>\n<p>\u9488\u5bf9 actor \u8868\u521b\u5efa\u89c6\u56fe actor_name_view&#xff0c;\u53ea\u5305\u542b first_name \u4ee5\u53ca last_name \u4e24\u5217\u3002<\/p>\n<h3>5.2 \u6807\u51c6\u89e3\u7b54<\/h3>\n<p><span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">VIEW<\/span> actor_name_view <span class=\"token keyword\">AS<\/span><br \/>\n<span class=\"token keyword\">SELECT<\/span> first_name<span class=\"token punctuation\">,<\/span> last_name<br \/>\n<span class=\"token keyword\">FROM<\/span> actor<span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h2>\u7ed3\u5c3e<\/h2>\n<p><font color=\"#3498db\"> uu\u4eec&#xff0c;\u672c\u6587\u7684\u5185\u5bb9\u5230\u8fd9\u91cc\u5c31\u5168\u90e8\u7ed3\u675f\u4e86&#xff0c;\u827e\u8389\u4e1d\u5728\u8fd9\u91cc\u518d\u6b21\u611f\u8c22\u60a8\u7684\u9605\u8bfb&#xff01;<\/font><\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<h3>\n<p>      <font color=\"#CC0000\">\u827e\u8389\u4e1d\u52aa\u529b\u7ec3\u5251<\/font><br \/>\n     <\/h3>\n<p><b><\/b><\/p>\n<p>     <font color=\"7B68EE\" size=\"4\">C\/C&#043;&#043; &amp; Linux \u5e95\u5c42\u63a2\u7d22\u8005 | \u4e00\u4e2a\u6b63\u5728\u52aa\u529b\u7ec3\u5251\u7684\u6280\u672f\u535a\u4e3b<\/font> <\/p>\n<hr \/>\n<p>       &#x1f440;<br \/>\n      <b>\u3010\u5173\u6ce8\u3011<\/b> \u8ddf\u968f\u6211\u4e00\u8d77\u6df1\u8015\u6280\u672f\u9886\u57df&#xff0c;\u89c1\u8bc1\u6bcf\u4e00\u6b21\u6210\u957f\u3002 <\/p>\n<p>       \u2764\ufe0f<br \/>\n      <b>\u3010\u70b9\u8d5e\u3011<\/b> \u8ba9\u4f18\u8d28\u5185\u5bb9\u88ab\u66f4\u591a\u4eba\u770b\u89c1&#xff0c;\u8ba9\u77e5\u8bc6\u4f20\u9012\u66f4\u6709\u529b\u91cf\u3002 <\/p>\n<p>       \u2b50<br \/>\n      <b>\u3010\u6536\u85cf\u3011<\/b> \u628a\u6838\u5fc3\u77e5\u8bc6\u70b9\u5b58\u597d&#xff0c;\u5728\u9700\u8981\u65f6\u968f\u65f6\u67e5\u3001\u968f\u65f6\u7528\u3002 <\/p>\n<p>       &#x1f4ac;<br \/>\n      <b>\u3010\u8bc4\u8bba\u3011<\/b> \u5206\u4eab\u4f60\u7684\u7ecf\u9a8c\u6216\u7591\u95ee&#xff0c;\u8bc4\u8bba\u533a\u4e00\u8d77\u4ea4\u6d41\u907f\u5751&#xff01; <\/p>\n<p><b><font color=\"#3498db\">\u4e0d\u8981\u5fd8\u8bb0\u7ed9\u535a\u4e3b\u201c\u4e00\u952e\u56db\u8fde\u201d\u54e6&#xff01;<\/font><\/b><\/p>\n<p>       <font color=\"#CC0000\">\u201c\u4eca\u65e5\u7ec3\u5251\u8fbe\u6210&#xff01;\u201d<\/font> <\/p>\n<p>     <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260807151557-6a75f6ad39cc9.png\" width=\"200\" \/> <\/p>\n<p> <font color=\"#9b59b6\"> \u201c\u6280\u672f\u4e4b\u8def\u96be\u514d\u6709\u56f0\u60d1&#xff0c;\u4f46\u540c\u884c\u7684\u4eba\u4f1a\u8ba9\u524d\u8fdb\u66f4\u6709\u65b9\u5411\u3002\u201d <\/font><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><font color=\"#e74c3c\"> \u7ed3\u8bed&#xff1a;\u5e0c\u671b\u5bf9\u5b66\u4e60Linux\u76f8\u5173\u5185\u5bb9\u7684uu\u6709\u6240\u5e2e\u52a9&#xff0c;\u4e0d\u8981\u5fd8\u8bb0\u7ed9\u535a\u4e3b\u201c\u4e00\u952e\u56db\u8fde\u201d\u54e6&#xff01;<\/font><\/p>\n<p><font color=\"#9b59b6\">\u5f80\u671f\u56de\u987e&#xff1a;<\/font><\/p>\n<p>\u3010MYSQL\u3011MYSQL\u5b66\u4e60\u7684\u4e00\u5927\u91cd\u70b9&#xff1a;\u4e8b\u52a1&#xff08;\u4e0b&#xff09;- InnoDB \u4e8b\u52a1\u9694\u79bb\u6027\u539f\u7406&#xff08;MVCC \u89c6\u89d2&#xff09;<\/p>\n<p>  <font color=\"#CC0000\">&#x1f5e1;\u535a\u4e3b\u5728\u8fd9\u91cc\u653e\u4e86\u4e00\u53ea\u5c0f\u72d7&#xff0c;\u5927\u5bb6\u770b\u5b8c\u4e86\u6478\u6478\u5c0f\u72d7\u653e\u677e\u4e00\u4e0b\u5427&#xff01;&#x1f5e1; 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