{"id":143843,"date":"2024-11-01T01:43:39","date_gmt":"2024-10-31T17:43:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143843\/"},"modified":"2024-11-01T01:43:40","modified_gmt":"2024-10-31T17:43:40","slug":"sql-%e8%85%b3%e6%9c%ac%e6%b7%bb%e5%8a%a0%e5%88%aa%e9%99%a4%e8%a1%a8%e8%a3%a1%e9%9d%a2%e5%ad%97%e6%ae%b5%e7%9a%84%e5%af%a6%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143843\/","title":{"rendered":"SQL \u8173\u672c\u6dfb\u52a0\u522a\u9664\u8868\u88e1\u9762\u5b57\u6bb5\u7684\u5be6\u4f8b"},"content":{"rendered":"<h1 id=\"sql-%e8%85%b3%e6%9c%ac%e6%b7%bb%e5%8a%a0%e5%88%aa%e9%99%a4%e8%a1%a8%e8%a3%a1%e9%9d%a2%e5%ad%97%e6%ae%b5%e7%9a%84%e5%af%a6%e4%be%8b-kEAgTtrpEz\">SQL \u8173\u672c\u6dfb\u52a0\u522a\u9664\u8868\u88e1\u9762\u5b57\u6bb5\u7684\u5be6\u4f8b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5c0d\u8868\u7d50\u69cb\u7684\u4fee\u6539\u662f\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6dfb\u52a0\u65b0\u5b57\u6bb5\u4ee5\u5b58\u5132\u66f4\u591a\u4fe1\u606f\uff0c\u9084\u662f\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u5b57\u6bb5\uff0c\u9019\u4e9b\u64cd\u4f5c\u90fd\u53ef\u4ee5\u901a\u904e SQL \u8173\u672c\u8f15\u9b06\u5be6\u73fe\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 SQL \u8173\u672c\u4f86\u6dfb\u52a0\u548c\u522a\u9664\u8868\u4e2d\u7684\u5b57\u6bb5\uff0c\u4e26\u63d0\u4f9b\u5177\u9ad4\u7684\u5be6\u4f8b\u4f86\u5e6b\u52a9\u7406\u89e3\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e5%ad%97%e6%ae%b5-kEAgTtrpEz\">\u6dfb\u52a0\u5b57\u6bb5<\/h2>\n<p>\u8981\u5728 SQL \u4e2d\u6dfb\u52a0\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u4fee\u6539\u73fe\u6709\u7684\u8868\u7d50\u69cb\uff0c\u5305\u62ec\u6dfb\u52a0\u65b0\u5b57\u6bb5\u3002\u4ee5\u4e0b\u662f\u6dfb\u52a0\u5b57\u6bb5\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD \u6b04\u4f4d\u540d \u6b04\u4f4d\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u8868\uff0c\u4e26\u4e14\u6211\u5011\u5e0c\u671b\u6dfb\u52a0\u4e00\u500b\u540d\u70ba <code>age<\/code> \u7684\u6574\u6578\u985e\u578b\u5b57\u6bb5\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8173\u672c\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD age INT;<\/code><\/pre>\n<p>\u57f7\u884c\u9019\u689d\u8a9e\u53e5\u5f8c\uff0c<code>users<\/code> \u8868\u4e2d\u5c07\u6703\u65b0\u589e\u4e00\u500b <code>age<\/code> \u5b57\u6bb5\uff0c\u4e26\u4e14\u8a72\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u70ba\u6574\u6578\u3002<\/p>\n<h2 id=\"%e5%88%aa%e9%99%a4%e5%ad%97%e6%ae%b5-kEAgTtrpEz\">\u522a\u9664\u5b57\u6bb5<\/h2>\n<p>\u8207\u6dfb\u52a0\u5b57\u6bb5\u985e\u4f3c\uff0c\u522a\u9664\u5b57\u6bb5\u4e5f\u53ef\u4ee5\u901a\u904e <code>ALTER TABLE<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u522a\u9664\u5b57\u6bb5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP \u6b04\u4f4d\u540d;<\/code><\/pre>\n<p>\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u5f9e <code>users<\/code> \u8868\u4e2d\u522a\u9664\u525b\u525b\u6dfb\u52a0\u7684 <code>age<\/code> \u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8173\u672c\uff1a<\/p>\n<pre><code>ALTER TABLE users DROP age;<\/code><\/pre>\n<p>\u57f7\u884c\u9019\u689d\u8a9e\u53e5\u5f8c\uff0c<code>age<\/code> \u5b57\u6bb5\u5c07\u6703\u5f9e <code>users<\/code> \u8868\u4e2d\u88ab\u522a\u9664\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-kEAgTtrpEz\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u5b57\u6bb5\u6dfb\u52a0\u6216\u522a\u9664\u64cd\u4f5c\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u7279\u5225\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5099\u4efd\uff1a<\/strong>\u5728\u4fee\u6539\u8868\u7d50\u69cb\u4e4b\u524d\uff0c\u5efa\u8b70\u5c0d\u6578\u64da\u5eab\u9032\u884c\u5099\u4efd\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li><strong>\u5b57\u6bb5\u4f9d\u8cf4\u6027\uff1a<\/strong>\u5728\u522a\u9664\u5b57\u6bb5\u4e4b\u524d\uff0c\u61c9\u6aa2\u67e5\u8a72\u5b57\u6bb5\u662f\u5426\u88ab\u5176\u4ed6\u8868\u6216\u61c9\u7528\u7a0b\u5e8f\u6240\u4f9d\u8cf4\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\uff1a<\/strong>\u6dfb\u52a0\u5b57\u6bb5\u6642\uff0c\u9700\u78ba\u4fdd\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u4ee5\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e4%be%8b%e7%b8%bd%e7%b5%90-kEAgTtrpEz\">\u5be6\u4f8b\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u4e0a\u8ff0\u793a\u4f8b\uff0c\u6211\u5011\u53ef\u4ee5\u770b\u5230\u5982\u4f55\u4f7f\u7528 SQL \u8173\u672c\u4f86\u6dfb\u52a0\u548c\u522a\u9664\u8868\u4e2d\u7684\u5b57\u6bb5\u3002\u9019\u4e9b\u64cd\u4f5c\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u9748\u6d3b\u5730\u8abf\u6574\u6578\u64da\u7d50\u69cb\u4ee5\u9069\u61c9\u4e0d\u65b7\u8b8a\u5316\u7684\u9700\u6c42\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-kEAgTtrpEz\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u7684\u65e5\u5e38\u7ba1\u7406\u4e2d\uff0c\u638c\u63e1 SQL \u8173\u672c\u7684\u4f7f\u7528\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u7121\u8ad6\u662f\u6dfb\u52a0\u9084\u662f\u522a\u9664\u5b57\u6bb5\uff0c\u6b63\u78ba\u7684\u64cd\u4f5c\u90fd\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u7ba1\u7406\u6578\u64da\u5eab\u7684\u7528\u6236\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\u53ef\u4ee5\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\uff0c\u8b93\u6578\u64da\u5eab\u64cd\u4f5c\u66f4\u52a0\u6d41\u66a2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 SQL \u8173\u672c\u6dfb\u52a0\u548c\u522a\u9664\u8868\u4e2d\u7684\u5b57\u6bb5\uff0c\u901a\u904e\u5be6\u4f8b\u638c\u63e1\u6578\u64da\u5eab\u7ba1\u7406\u7684\u57fa\u672c\u6280\u5de7\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-143843","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143843","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=143843"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143843\/revisions"}],"predecessor-version":[{"id":143844,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143843\/revisions\/143844"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}