{"id":162925,"date":"2024-11-04T19:10:21","date_gmt":"2024-11-04T11:10:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162925\/"},"modified":"2024-11-04T19:10:22","modified_gmt":"2024-11-04T11:10:22","slug":"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8c%e4%bf%ae%e6%94%b9sql%e8%a1%a8%e7%b5%90%e6%a7%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162925\/","title":{"rendered":"\u6559\u60a8\u5982\u4f55\u9032\u884c\u4fee\u6539SQL\u8868\u7d50\u69cb"},"content":{"rendered":"<h1 id=\"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8c%e4%bf%ae%e6%94%b9sql%e8%a1%a8%e7%b5%90%e6%a7%8b-ItqbLkfsHO\">\u6559\u60a8\u5982\u4f55\u9032\u884c\u4fee\u6539SQL\u8868\u7d50\u69cb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u4fee\u6539SQL\u8868\u7d50\u69cb\u662f\u4e00\u9805\u5e38\u898b\u7684\u4efb\u52d9\u3002\u7121\u8ad6\u662f\u6dfb\u52a0\u65b0\u6b04\u4f4d\u3001\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6b04\u4f4d\uff0c\u9084\u662f\u66f4\u6539\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\uff0c\u9019\u4e9b\u64cd\u4f5c\u90fd\u9700\u8981\u8b39\u614e\u9032\u884c\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u4fee\u6539\u8868\u7d50\u69cb\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-ItqbLkfsHO\">\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u4e86\u89e3\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u8868\u7d50\u69cb\u662f\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u6578\u64da\u7684\u57fa\u672c\u55ae\u4f4d\uff0c\u6bcf\u500b\u8868\u7531\u591a\u500b\u6b04\u4f4d\u7d44\u6210\uff0c\u6bcf\u500b\u6b04\u4f4d\u90fd\u6709\u5176\u7279\u5b9a\u7684\u6578\u64da\u985e\u578b\u548c\u5c6c\u6027\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8alter-table%e8%aa%9e%e5%8f%a5-ItqbLkfsHO\">\u4f7f\u7528ALTER TABLE\u8a9e\u53e5<\/h2>\n<p>\u8981\u4fee\u6539\u8868\u7d50\u69cb\uff0c\u6211\u5011\u901a\u5e38\u4f7f\u7528<code>ALTER TABLE<\/code>\u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u591a\u7a2e\u64cd\u4f5c\uff0c\u5305\u62ec\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u6b04\u4f4d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u7528\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e6%b7%bb%e5%8a%a0%e6%96%b0%e6%ac%84%e4%bd%8d-ItqbLkfsHO\">1. \u6dfb\u52a0\u65b0\u6b04\u4f4d<\/h3>\n<p>\u5982\u679c\u9700\u8981\u5728\u73fe\u6709\u8868\u4e2d\u6dfb\u52a0\u65b0\u6b04\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD \u6b04\u4f4d\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8868\uff0c\u6211\u5011\u60f3\u8981\u6dfb\u52a0\u4e00\u500b\u540d\u70ba<code>age<\/code>\u7684\u6574\u6578\u6b04\u4f4d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD age INT;<\/code><\/pre>\n<h3 id=\"2-%e5%88%aa%e9%99%a4%e6%ac%84%e4%bd%8d-ItqbLkfsHO\">2. \u522a\u9664\u6b04\u4f4d<\/h3>\n<p>\u5982\u679c\u67d0\u500b\u6b04\u4f4d\u4e0d\u518d\u9700\u8981\uff0c\u53ef\u4ee5\u4f7f\u7528<code>DROP<\/code>\u95dc\u9375\u5b57\u4f86\u522a\u9664\u5b83\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP \u6b04\u4f4d\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5f9e<code>users<\/code>\u8868\u4e2d\u522a\u9664<code>age<\/code>\u6b04\u4f4d\uff1a<\/p>\n<pre><code>ALTER TABLE users DROP age;<\/code><\/pre>\n<h3 id=\"3-%e4%bf%ae%e6%94%b9%e6%ac%84%e4%bd%8d%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-ItqbLkfsHO\">3. \u4fee\u6539\u6b04\u4f4d\u6578\u64da\u985e\u578b<\/h3>\n<p>\u5982\u679c\u9700\u8981\u66f4\u6539\u67d0\u500b\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528<code>MODIFY<\/code>\u95dc\u9375\u5b57\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d MODIFY \u6b04\u4f4d\u540d \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5c07<code>users<\/code>\u8868\u4e2d\u7684<code>username<\/code>\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u5f9e<code>VARCHAR(50)<\/code>\u6539\u70ba<code>VARCHAR(100)<\/code>\uff1a<\/p>\n<pre><code>ALTER TABLE users MODIFY username VARCHAR(100);<\/code><\/pre>\n<h3 id=\"4-%e9%87%8d%e5%91%bd%e5%90%8d%e6%ac%84%e4%bd%8d-ItqbLkfsHO\">4. \u91cd\u547d\u540d\u6b04\u4f4d<\/h3>\n<p>\u5982\u679c\u9700\u8981\u91cd\u547d\u540d\u67d0\u500b\u6b04\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>CHANGE<\/code>\u95dc\u9375\u5b57\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d CHANGE \u820a\u6b04\u4f4d\u540d \u65b0\u6b04\u4f4d\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5c07<code>users<\/code>\u8868\u4e2d\u7684<code>username<\/code>\u6b04\u4f4d\u91cd\u547d\u540d\u70ba<code>user_name<\/code>\uff1a<\/p>\n<pre><code>ALTER TABLE users CHANGE username user_name VARCHAR(100);<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ItqbLkfsHO\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4fee\u6539\u8868\u7d50\u69cb\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u7279\u5225\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5728\u9032\u884c\u4efb\u4f55\u4fee\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li>\u67d0\u4e9b\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u5230\u8868\u4e2d\u7684\u6578\u64da\u5b8c\u6574\u6027\uff0c\u7279\u5225\u662f\u522a\u9664\u6b04\u4f4d\u6216\u66f4\u6539\u6578\u64da\u985e\u578b\u6642\uff0c\u9700\u8b39\u614e\u8003\u616e\u3002<\/li>\n<li>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u9032\u884c\u4fee\u6539\u6642\uff0c\u6700\u597d\u5728\u4f4e\u5cf0\u671f\u9032\u884c\uff0c\u4ee5\u6e1b\u5c11\u5c0d\u7528\u6236\u7684\u5f71\u97ff\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ItqbLkfsHO\">\u7e3d\u7d50<\/h2>\n<p>\u4fee\u6539SQL\u8868\u7d50\u69cb\u662f\u4e00\u9805\u91cd\u8981\u7684\u6578\u64da\u5eab\u7ba1\u7406\u6280\u80fd\uff0c\u901a\u904e\u4f7f\u7528<code>ALTER TABLE<\/code>\u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u6b04\u4f4d\u3002\u7121\u8ad6\u662f\u70ba\u4e86\u9069\u61c9\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u9084\u662f\u70ba\u4e86\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u90fd\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728<code>VPS<\/code>\u74b0\u5883\u4e2d\u7ba1\u7406\u6578\u64da\u5eab\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e<code>\u9999\u6e2fVPS<\/code>\u548c<code>\u4e91\u670d\u52a1\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u4fee\u6539SQL\u8868\u7d50\u69cb\uff0c\u638c\u63e1ALTER\u8a9e\u53e5\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6280\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-162925","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162925","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=162925"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162925\/revisions"}],"predecessor-version":[{"id":162926,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162925\/revisions\/162926"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}