{"id":93079,"date":"2026-08-11T20:56:44","date_gmt":"2026-08-11T12:56:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/93079.html"},"modified":"2026-08-11T20:56:44","modified_gmt":"2026-08-11T12:56:44","slug":"mysql%e5%a4%af%e5%ae%9e%e5%9f%ba%e7%a1%803-%e4%bd%bf%e7%94%a8sql%e8%af%ad%e5%8f%a5%e5%ae%9a%e4%b9%89mysql%e6%95%b0%e6%8d%ae%e8%a1%a8table","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/93079.html","title":{"rendered":"MySQL\u592f\u5b9e\u57fa\u78403: \u4f7f\u7528SQL\u8bed\u53e5\u5b9a\u4e49MySQL\u6570\u636e\u8868TABLE"},"content":{"rendered":"<p>1 \u6570\u636e\u8868\u662f\u6570\u636e\u5e93\u4e2d\u6700\u91cd\u8981\u3001\u6700\u57fa\u672c\u7684\u6570\u636e\u5bf9\u8c61&#xff0c;\u662f\u6570\u636e\u5b58\u50a8\u7684\u57fa\u672c\u5355\u4f4d&#xff0c;\u82e5\u6ca1\u6709\u6570\u636e\u8868&#xff0c;\u6570\u636e\u5e93\u4e2d\u5176\u4ed6\u7684\u6570\u636e\u5bf9\u8c61\u5c31\u6ca1\u6709\u610f\u4e49\u3002<br \/>\n2 \u521b\u5efa\u6570\u636e\u8868\u7684\u8fc7\u7a0b\u662f\u5b9a\u4e49\u6bcf\u4e2a\u5b57\u6bb5\u7684\u8fc7\u7a0b&#xff0c;\u540c\u65f6\u4e5f\u662f\u5b9e\u65bd\u6570\u636e\u5b8c\u6574\u6027\u7ea6\u675f\u7684\u8fc7\u7a0b\u3002<br \/>\n3 \u786e\u5b9a\u8868\u4e2d\u6bcf\u4e2a\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b\u662f\u521b\u5efa\u8868\u7684\u91cd\u8981\u6b65\u9aa4\u3002<\/p>\n<p>1. \u6570\u636e\u7c7b\u578b<\/p>\n<p>\u5728\u521b\u5efa\u8868\u65f6\u5fc5\u987b\u4e3a\u8868\u7684\u6bcf\u4e2a\u5b57\u6bb5\u6307\u5b9a\u6b63\u786e\u7684\u6570\u636e\u7c7b\u578b\u53ca\u53ef\u80fd\u7684\u6570\u636e\u957f\u5ea6\u3002<\/p>\n<p>\u00b7 \u6570\u503c\u578b:INT(M), \u666e\u901a\u5927\u5c0f\u7684\u6574\u6570 -2 147 483 648&#xff5e;2 147 483 647, \u65e0\u7b26\u53f7\u8303\u56f40&#xff5e;4 294 967 295\u3002<\/p>\n<p>\u00b7 \u65e5\u671f\u578b:DATE,  \u2018YYYY-MM-DD\u2019\u3002<br \/>\n\u00b7 \u65f6\u95f4\u578b:TIME, HH:MM:SS\u3002<\/p>\n<p>\u00b7 \u5b57\u7b26\u578b:<br \/>\nCHAR(M) , \u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u6570\u636e\u7c7b\u578b, M\u8868\u793a\u5217\u957f\u5ea6&#xff0c;\u8303\u56f40&#xff5e;255\u4e2a\u5b57\u7b26\u3002<br \/>\nVARCHAR(M), \u53ef\u53d8\u957f\u7684\u5b57\u7b26\u6570\u636e\u7c7b\u578b&#xff0c;M\u8868\u793a\u6700\u5927\u5217\u957f\u5ea6&#xff0c;\u5176\u8303\u56f4\u662f0&#xff5e;65 535\u3002<\/p>\n<p>2. \u4f7f\u7528SQL\u8bed\u53e5\u5b9a\u4e49MySQL\u6570\u636e\u8868TABLE<\/p>\n<p>\u4e3b\u8981\u56f4\u7ed5Data Definition Language\u7684\u4e09\u5927\u5173\u952e\u8bcdCREATE\u3001ALTER\u3001DROP\u5b9a\u4e49\u6570\u636e\u8868TABLE\u3002<\/p>\n<p>\u00b7 \u521b\u5efa\u8868 CREATE TABLE<\/p>\n<p><span class=\"token keyword\">USE<\/span> db_company<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp<br \/>\n<span class=\"token punctuation\">(<\/span> empNo <span class=\"token keyword\">INT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token boolean\">NULL<\/span> <span class=\"token keyword\">UNIQUE<\/span> <span class=\"token keyword\">AUTO_INCREMENT<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  empName <span class=\"token keyword\">VARCHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token boolean\">NULL<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  sex <span class=\"token keyword\">CHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  birthday <span class=\"token keyword\">DATE<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  native <span class=\"token keyword\">VARCHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  nation <span class=\"token keyword\">VARCHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">DEFAULT<\/span> \u2018\u6c49\u2019<span class=\"token punctuation\">,<\/span><br \/>\n  deptNo <span class=\"token keyword\">CHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">ENGINE<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token keyword\">InnoDB<\/span><span class=\"token punctuation\">;<\/span> <\/p>\n<p>\u00b7 \u4fee\u6539\u8868 ALTER TABLE<\/p>\n<p><span class=\"token comment\">## \u6539\u8868\u540d<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp <span class=\"token keyword\">RENAME<\/span> <span class=\"token keyword\">TO<\/span> backup_tb_emp<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">## \u52a0\u5b57\u6bb5<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp <span class=\"token keyword\">ADD<\/span> <span class=\"token keyword\">COLUMN<\/span> id <span class=\"token keyword\">INT<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token boolean\">NULL<\/span> <span class=\"token keyword\">UNIQUE<\/span> <span class=\"token keyword\">AUTO_INCREMENT<\/span> <span class=\"token keyword\">FIRST<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">## \u6539\u5b57\u6bb5<\/span><br \/>\n<span class=\"token comment\">## a. \u6539\u5b57\u6bb5\u7684\u540d\u5b57\u3001\u6570\u636e\u7c7b\u578b\u3001\u7ea6\u675f\u7b49<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp CHANGE <span class=\"token keyword\">COLUMN<\/span> birthday age <span class=\"token keyword\">TINYINT<\/span> <span class=\"token boolean\">NULL<\/span> <span class=\"token keyword\">DEFAULT<\/span> <span class=\"token number\">18<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">## b. \u6539\u5b57\u6bb5\u7684\u9ed8\u8ba4\u503c<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp <span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">COLUMN<\/span> department <span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">DEFAULT<\/span>&#xff1b;<br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp <span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">COLUMN<\/span> department <span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">DEFAULT<\/span> <span class=\"token string\">&#039;\u9500\u552e\u90e8&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">## c.\u53ea\u6539\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp <span class=\"token keyword\">MODIFY<\/span> <span class=\"token keyword\">COLUMN<\/span> department <span class=\"token keyword\">VARCHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token boolean\">NULL<\/span> <span class=\"token keyword\">AFTER<\/span> empNAME<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">## \u5220\u5b57\u6bb5 &#xff08;domain\u4e5f\u4e00\u8d77\u5220\u9664&#xff09;<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> tb_student2 <span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">COLUMN<\/span> id<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u00b7 \u5220\u9664\u8868 DROP TABLE<\/p>\n<p><span class=\"token comment\">## \u53ef\u5b9e\u73b0\u5220\u9664\u591a\u4e2a\u8868\u683c<\/span><br \/>\n<span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp<span class=\"token punctuation\">,<\/span> tb_emp1<span class=\"token punctuation\">,<\/span> tb_emp2<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u00b7 \u67e5\u770b\u8868\u7684\u540d\u79f0\u3001\u57fa\u672c\u7ed3\u6784\u3001\u5b58\u50a8\u5f15\u64ce\u53ca\u5b57\u7b26\u7f16\u7801<\/p>\n<p><span class=\"token keyword\">SHOW<\/span> <span class=\"token keyword\">TABLES<\/span> <span class=\"token keyword\">FROM<\/span> db_company<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">DESC<\/span> tb_emp<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">SHOW<\/span> <span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> tb_emp<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4e0b\u4e00\u671f\u9884\u544a&#xff1a;\u4f7f\u7528SQL\u8bed\u53e5\u5b9e\u73b0\u8868 \u6570\u636e\u7684\u63d2\u5165\u3001\u5220\u9664\u3001\u66f4\u65b0\u7b49\u64cd\u4f5c\u65b9\u6cd5\u53ca\u5e94\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1 \u6570\u636e\u8868\u662f\u6570\u636e\u5e93\u4e2d\u6700\u91cd\u8981\u3001\u6700\u57fa\u672c\u7684\u6570\u636e\u5bf9\u8c61&#xff0c;\u662f\u6570\u636e\u5b58\u50a8\u7684\u57fa\u672c\u5355\u4f4d&#xff0c;\u82e5\u6ca1\u6709\u6570\u636e\u8868&#xff0c;\u6570\u636e\u5e93\u4e2d\u5176\u4ed6\u7684\u6570\u636e\u5bf9\u8c61\u5c31\u6ca1\u6709\u610f\u4e49\u3002<br \/>\n2 \u521b\u5efa\u6570\u636e\u8868\u7684\u8fc7\u7a0b\u662f\u5b9a\u4e49\u6bcf\u4e2a\u5b57\u6bb5\u7684\u8fc7\u7a0b&#xff0c;\u540c\u65f6\u4e5f\u662f\u5b9e\u65bd\u6570\u636e\u5b8c\u6574\u6027\u7ea6\u675f\u7684\u8fc7\u7a0b\u3002<br \/>\n3 \u786e\u5b9a\u8868\u4e2d\u6bcf\u4e2a\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b\u662f\u521b\u5efa\u8868\u7684\u91cd\u8981\u6b65\u9aa4\u30021. \u6570\u636e\u7c7b\u578b<br \/>\n\u5728\u521b\u5efa\u8868\u65f6\u5fc5\u987b\u4e3a\u8868\u7684\u6bcf\u4e2a\u5b57\u6bb5\u6307\u5b9a\u6b63\u786e\u7684\u6570\u636e\u7c7b\u578b\u53ca\u53ef\u80fd\u7684\u6570\u636e\u957f\u5ea6\u3002<br \/>\n\u00b7 \u6570\u503c\u578b:INT(M), \u666e\u901a\u5927\u5c0f\u7684\u6574\u6570 -2 147 483 648&#xff5e;2 14<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[114,768,100],"topic":[],"class_list":["post-93079","post","type-post","status-publish","format-standard","hentry","category-server","tag-mysql","tag-sql","tag-100"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MySQL\u592f\u5b9e\u57fa\u78403: \u4f7f\u7528SQL\u8bed\u53e5\u5b9a\u4e49MySQL\u6570\u636e\u8868TABLE - \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\/93079.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL\u592f\u5b9e\u57fa\u78403: \u4f7f\u7528SQL\u8bed\u53e5\u5b9a\u4e49MySQL\u6570\u636e\u8868TABLE - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"1 \u6570\u636e\u8868\u662f\u6570\u636e\u5e93\u4e2d\u6700\u91cd\u8981\u3001\u6700\u57fa\u672c\u7684\u6570\u636e\u5bf9\u8c61&#xff0c;\u662f\u6570\u636e\u5b58\u50a8\u7684\u57fa\u672c\u5355\u4f4d&#xff0c;\u82e5\u6ca1\u6709\u6570\u636e\u8868&#xff0c;\u6570\u636e\u5e93\u4e2d\u5176\u4ed6\u7684\u6570\u636e\u5bf9\u8c61\u5c31\u6ca1\u6709\u610f\u4e49\u3002 2 \u521b\u5efa\u6570\u636e\u8868\u7684\u8fc7\u7a0b\u662f\u5b9a\u4e49\u6bcf\u4e2a\u5b57\u6bb5\u7684\u8fc7\u7a0b&#xff0c;\u540c\u65f6\u4e5f\u662f\u5b9e\u65bd\u6570\u636e\u5b8c\u6574\u6027\u7ea6\u675f\u7684\u8fc7\u7a0b\u3002 3 \u786e\u5b9a\u8868\u4e2d\u6bcf\u4e2a\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b\u662f\u521b\u5efa\u8868\u7684\u91cd\u8981\u6b65\u9aa4\u30021. \u6570\u636e\u7c7b\u578b 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