{"id":143977,"date":"2024-11-01T02:50:17","date_gmt":"2024-10-31T18:50:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143977\/"},"modified":"2024-11-01T02:50:18","modified_gmt":"2024-10-31T18:50:18","slug":"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9b%b4%e6%96%b0%e8%aa%9e%e5%8f%a5%e5%af%a6%e4%be%8b%e8%a7%a3%e6%9e%90-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9b%b4%e6%96%b0%e8%aa%9e%e5%8f%a5%e6%a1%88%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143977\/","title":{"rendered":"SQL \u6578\u64da\u5eab\u66f4\u65b0\u8a9e\u53e5\u5be6\u4f8b\u89e3\u6790 (sql \u6578\u64da\u5eab\u4e2d\u66f4\u65b0\u8a9e\u53e5\u6848\u4f8b)"},"content":{"rendered":"<h1 id=\"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9b%b4%e6%96%b0%e8%aa%9e%e5%8f%a5%e5%af%a6%e4%be%8b%e8%a7%a3%e6%9e%90-wgGfzUoPZt\">SQL \u6578\u64da\u5eab\u66f4\u65b0\u8a9e\u53e5\u5be6\u4f8b\u89e3\u6790<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u66f4\u65b0\u6578\u64da\u662f\u975e\u5e38\u5e38\u898b\u7684\u64cd\u4f5c\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u8a18\u9304\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQL \u6578\u64da\u5eab\u4e2d\u7684\u66f4\u65b0\u8a9e\u53e5\uff0c\u4e26\u901a\u904e\u5be6\u4f8b\u89e3\u6790\u5176\u7528\u6cd5\u3002<\/p>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-wgGfzUoPZt\">\u66f4\u65b0\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u66f4\u65b0\u6578\u64da\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE \u8868\u540d\nSET \u52171 = \u503c1, \u52172 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>UPDATE<\/code> \u662f\u7528\u4f86\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u8868\uff0c<code>SET<\/code> \u7528\u4f86\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u5217\u53ca\u5176\u65b0\u503c\uff0c\u800c <code>WHERE<\/code> \u5b50\u53e5\u5247\u7528\u4f86\u9650\u5236\u54ea\u4e9b\u8a18\u9304\u6703\u88ab\u66f4\u65b0\u3002\u5982\u679c\u4e0d\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u5247\u6240\u6709\u8a18\u9304\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e5%af%a6%e4%be%8b%e8%a7%a3%e6%9e%90-wgGfzUoPZt\">\u5be6\u4f8b\u89e3\u6790<\/h2>\n<h3 id=\"%e4%be%8b%e5%ad%90-1%ef%bc%9a%e6%9b%b4%e6%96%b0%e5%96%ae%e5%80%8b%e5%88%97-wgGfzUoPZt\">\u4f8b\u5b50 1\uff1a\u66f4\u65b0\u55ae\u500b\u5217<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u5305\u542b\u54e1\u5de5\u7684\u59d3\u540d\u548c\u85aa\u6c34\u3002\u73fe\u5728\u6211\u5011\u60f3\u8981\u5c07\u67d0\u4f4d\u54e1\u5de5\u7684\u85aa\u6c34\u66f4\u65b0\u70ba 60000\u3002<\/p>\n<pre><code>UPDATE employees\nSET salary = 60000\nWHERE name = 'John Doe';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u4f86\u6307\u5b9a\u53ea\u66f4\u65b0\u540d\u70ba John Doe \u7684\u54e1\u5de5\u7684\u85aa\u6c34\u3002<\/p>\n<h3 id=\"%e4%be%8b%e5%ad%90-2%ef%bc%9a%e6%9b%b4%e6%96%b0%e5%a4%9a%e5%80%8b%e5%88%97-wgGfzUoPZt\">\u4f8b\u5b50 2\uff1a\u66f4\u65b0\u591a\u500b\u5217<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u540c\u6642\u66f4\u65b0\u591a\u500b\u5217\uff0c\u4f8b\u5982\u66f4\u65b0\u54e1\u5de5\u7684\u85aa\u6c34\u548c\u8077\u4f4d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>UPDATE employees\nSET salary = 65000, position = 'Senior Developer'\nWHERE name = 'Jane Smith';<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u5728\u4e00\u500b\u8a9e\u53e5\u4e2d\u540c\u6642\u66f4\u65b0\u591a\u500b\u5c6c\u6027\u3002<\/p>\n<h3 id=\"%e4%be%8b%e5%ad%90-3%ef%bc%9a%e4%b8%8d%e4%bd%bf%e7%94%a8-where-%e5%ad%90%e5%8f%a5-wgGfzUoPZt\">\u4f8b\u5b50 3\uff1a\u4e0d\u4f7f\u7528 WHERE \u5b50\u53e5<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u5c07\u6240\u6709\u54e1\u5de5\u7684\u85aa\u6c34\u63d0\u9ad8 10%\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>UPDATE employees\nSET salary = salary * 1.1;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7531\u65bc\u6c92\u6709\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u6240\u6709\u54e1\u5de5\u7684\u85aa\u6c34\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-wgGfzUoPZt\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5728\u9032\u884c\u5927\u898f\u6a21\u66f4\u65b0\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u66f4\u65b0\u8a9e\u53e5\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u57f7\u884c\u66f4\u65b0\u8a9e\u53e5\u4e4b\u524d\uff0c\u6700\u597d\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9032\u884c\u6e2c\u8a66\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-wgGfzUoPZt\">\u7d50\u8ad6<\/h2>\n<p>SQL \u7684\u66f4\u65b0\u8a9e\u53e5\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528 <code>UPDATE<\/code> \u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u7dad\u8b77\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u66f4\u65b0\u55ae\u500b\u5217\u9084\u662f\u591a\u500b\u5217\uff0c\u7406\u89e3\u5176\u8a9e\u6cd5\u548c\u7528\u6cd5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684\u6578\u64da\u5eab\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL \u6578\u64da\u5eab\u66f4\u65b0\u8a9e\u53e5\u7684\u5be6\u4f8b\u89e3\u6790\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u4fee\u6539\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\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-143977","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143977","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=143977"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143977\/revisions"}],"predecessor-version":[{"id":143978,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143977\/revisions\/143978"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143977"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143977"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}