{"id":144069,"date":"2024-11-01T04:40:28","date_gmt":"2024-10-31T20:40:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/144069\/"},"modified":"2024-11-01T04:40:29","modified_gmt":"2024-10-31T20:40:29","slug":"sql-%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b7%bb%e5%8a%a0%e4%b8%80%e5%88%97-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b7%bb%e5%8a%a0%e4%b8%80%e5%88%97%e7%9a%84-sql-%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/144069\/","title":{"rendered":"SQL \u8a9e\u53e5\u5be6\u73fe\u6578\u64da\u5eab\u6dfb\u52a0\u4e00\u5217 (\u6578\u64da\u5eab\u6dfb\u52a0\u4e00\u5217\u7684 sql \u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"sql-%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b7%bb%e5%8a%a0%e4%b8%80%e5%88%97-XNAfiELVsU\">SQL \u8a9e\u53e5\u5be6\u73fe\u6578\u64da\u5eab\u6dfb\u52a0\u4e00\u5217<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d93\u5e38\u9700\u8981\u6839\u64da\u696d\u52d9\u9700\u6c42\u5c0d\u6578\u64da\u8868\u9032\u884c\u4fee\u6539\uff0c\u5176\u4e2d\u4e00\u500b\u5e38\u898b\u7684\u64cd\u4f5c\u5c31\u662f\u6dfb\u52a0\u65b0\u5217\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u6dfb\u52a0\u4e00\u5217\u7684\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-sql-%e8%aa%9e%e5%8f%a5%ef%bc%9f-XNAfiELVsU\">\u4ec0\u9ebc\u662f SQL \u8a9e\u53e5\uff1f<\/h2>\n<p>SQL\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\u5b83\u5141\u8a31\u7528\u6236\u57f7\u884c\u5404\u7a2e\u64cd\u4f5c\uff0c\u5305\u62ec\u67e5\u8a62\u6578\u64da\u3001\u66f4\u65b0\u6578\u64da\u3001\u522a\u9664\u6578\u64da\u4ee5\u53ca\u4fee\u6539\u6578\u64da\u7d50\u69cb\u3002\u6dfb\u52a0\u5217\u7684\u64cd\u4f5c\u901a\u5e38\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e5%88%97%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-XNAfiELVsU\">\u6dfb\u52a0\u5217\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u6dfb\u52a0\u65b0\u5217\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD \u5217\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u9019\u88e1\u7684 <code>\u8868\u540d<\/code> \u662f\u4f60\u8981\u4fee\u6539\u7684\u6578\u64da\u8868\u7684\u540d\u7a31\uff0c<code>\u5217\u540d<\/code> \u662f\u4f60\u60f3\u8981\u6dfb\u52a0\u7684\u65b0\u5217\u7684\u540d\u7a31\uff0c\u800c <code>\u6578\u64da\u985e\u578b<\/code> \u5247\u662f\u8a72\u5217\u6240\u9700\u5b58\u5132\u7684\u6578\u64da\u985e\u578b\uff0c\u4f8b\u5982 <code>VARCHAR<\/code>\u3001<code>INT<\/code>\u3001<code>DATE<\/code> \u7b49\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e6%b7%bb%e5%8a%a0%e4%b8%80%e5%88%97-XNAfiELVsU\">\u793a\u4f8b\uff1a\u6dfb\u52a0\u4e00\u5217<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u6578\u64da\u8868\uff0c\u8a72\u8868\u5305\u542b\u7528\u6236\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u5982\u7528\u6236\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u3002\u73fe\u5728\uff0c\u6211\u5011\u5e0c\u671b\u70ba\u8a72\u8868\u6dfb\u52a0\u4e00\u500b\u540d\u70ba <code>age<\/code> \u7684\u65b0\u5217\uff0c\u4ee5\u5b58\u5132\u7528\u6236\u7684\u5e74\u9f61\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD age INT;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u5728 <code>users<\/code> \u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u540d\u70ba <code>age<\/code> \u7684\u6574\u6578\u985e\u578b\u5217\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e5%88%97%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-XNAfiELVsU\">\u6dfb\u52a0\u5217\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u9078\u64c7\uff1a<\/strong>\u5728\u6dfb\u52a0\u65b0\u5217\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u975e\u5e38\u91cd\u8981\u3002\u78ba\u4fdd\u6240\u9078\u7684\u6578\u64da\u985e\u578b\u80fd\u5920\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/li>\n<li><strong>\u9ed8\u8a8d\u503c\uff1a<\/strong>\u5982\u679c\u9700\u8981\uff0c\u53ef\u4ee5\u5728\u6dfb\u52a0\u5217\u6642\u6307\u5b9a\u9ed8\u8a8d\u503c\u3002\u4f8b\u5982\uff1a<code>ALTER TABLE users ADD age INT DEFAULT 0;<\/code>\u3002<\/li>\n<li><strong>\u5f71\u97ff\u6027\u80fd\uff1a<\/strong>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u8868\uff0c\u6dfb\u52a0\u5217\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9ad8\u6d41\u91cf\u7684\u751f\u7522\u74b0\u5883\u4e2d\u3002\u56e0\u6b64\uff0c\u5efa\u8b70\u5728\u4f4e\u5cf0\u671f\u9032\u884c\u6b64\u985e\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u7d50\u69cb\u6027\u8b8a\u66f4\u4e4b\u524d\uff0c\u52d9\u5fc5\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u60c5\u6cc1\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-XNAfiELVsU\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528 SQL \u8a9e\u53e5\u6dfb\u52a0\u65b0\u5217\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u4f46\u5728\u5be6\u65bd\u6642\u9700\u8981\u8b39\u614e\u8003\u616e\u6578\u64da\u985e\u578b\u3001\u9ed8\u8a8d\u503c\u53ca\u6027\u80fd\u5f71\u97ff\u7b49\u56e0\u7d20\u3002\u901a\u904e\u6b63\u78ba\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u64f4\u5c55\u6578\u64da\u8868\u7684\u529f\u80fd\uff0c\u4ee5\u6eff\u8db3\u4e0d\u65b7\u8b8a\u5316\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u7372\u5f97\u66f4\u9ad8\u7684\u9748\u6d3b\u6027\u548c\u63a7\u5236\u6b0a\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7684\u642d\u5efa\u9084\u662f\u61c9\u7528\u7684\u90e8\u7f72\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u90fd\u80fd\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u5f37\u6709\u529b\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u5728\u6578\u64da\u5eab\u4e2d\u6dfb\u52a0\u65b0\u5217\uff0c\u7c21\u55ae\u6b65\u9a5f\u8f15\u9b06\u64f4\u5c55\u6578\u64da\u8868\u7d50\u69cb\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-144069","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144069","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=144069"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144069\/revisions"}],"predecessor-version":[{"id":144070,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144069\/revisions\/144070"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=144069"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=144069"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=144069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}