{"id":144037,"date":"2024-11-01T03:24:25","date_gmt":"2024-10-31T19:24:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/144037\/"},"modified":"2024-11-01T03:24:26","modified_gmt":"2024-10-31T19:24:26","slug":"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e7%9a%84%e4%bb%a3%e7%a2%bc-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e4%bb%a3%e7%a2%bc","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/144037\/","title":{"rendered":"SQL \u6578\u64da\u5eab\u6578\u64da\u66f4\u65b0\u7684\u4ee3\u78bc (sql \u6578\u64da\u5eab\u66f4\u65b0\u6578\u64da\u4ee3\u78bc)"},"content":{"rendered":"<h1 id=\"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e7%9a%84%e4%bb%a3%e7%a2%bc-NEFcALNWOp\">SQL \u6578\u64da\u5eab\u6578\u64da\u66f4\u65b0\u7684\u4ee3\u78bc<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u662f\u5b58\u5132\u548c\u7ba1\u7406\u6578\u64da\u7684\u6838\u5fc3\u7d44\u4ef6\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u7528\u65bc\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u7684\u6a19\u6e96\u8a9e\u8a00\uff0c\u5176\u4e2d\u6578\u64da\u66f4\u65b0\u662f\u6700\u5e38\u898b\u7684\u64cd\u4f5c\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQL \u6578\u64da\u5eab\u4e2d\u6578\u64da\u66f4\u65b0\u7684\u4ee3\u78bc\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"sql-%e6%9b%b4%e6%96%b0%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-NEFcALNWOp\">SQL \u66f4\u65b0\u8a9e\u53e5\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u66f4\u65b0\u6578\u64da\u7684\u4e3b\u8981\u8a9e\u53e5\u662f <code>UPDATE<\/code>\u3002\u5176\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>\u5728\u9019\u88e1\uff0c<code>\u8868\u540d<\/code> \u662f\u8981\u66f4\u65b0\u7684\u6578\u64da\u8868\uff0c<code>SET<\/code> \u7528\u65bc\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u5217\u53ca\u5176\u65b0\u503c\uff0c\u800c <code>WHERE<\/code> \u5b50\u53e5\u5247\u7528\u65bc\u6307\u5b9a\u54ea\u4e9b\u884c\u9700\u8981\u88ab\u66f4\u65b0\u3002\u82e5\u4e0d\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u5247\u6240\u6709\u884c\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e6%9b%b4%e6%96%b0%e5%96%ae%e5%80%8b%e5%ad%97%e6%ae%b5-NEFcALNWOp\">\u793a\u4f8b\uff1a\u66f4\u65b0\u55ae\u500b\u5b57\u6bb5<\/h2>\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\u82e5\u8981\u5c07\u67d0\u4f4d\u54e1\u5de5\u7684\u85aa\u6c34\u66f4\u65b0\u70ba 50000\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE employees\nSET salary = 50000\nWHERE name = 'John Doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u53ea\u66f4\u65b0\u540d\u70ba John Doe \u7684\u54e1\u5de5\u7684\u85aa\u6c34\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e6%9b%b4%e6%96%b0%e5%a4%9a%e5%80%8b%e5%ad%97%e6%ae%b5-NEFcALNWOp\">\u793a\u4f8b\uff1a\u66f4\u65b0\u591a\u500b\u5b57\u6bb5<\/h2>\n<p>\u5982\u679c\u9700\u8981\u540c\u6642\u66f4\u65b0\u591a\u500b\u5b57\u6bb5\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 = 60000, position = 'Senior Developer'\nWHERE name = 'Jane Smith';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u66f4\u65b0 Jane Smith \u7684\u85aa\u6c34\u548c\u8077\u4f4d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-NEFcALNWOp\">\u4f7f\u7528\u689d\u4ef6\u66f4\u65b0\u6578\u64da<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u66f4\u65b0\u591a\u884c\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5c07\u6240\u6709\u85aa\u6c34\u4f4e\u65bc 30000 \u7684\u54e1\u5de5\u85aa\u6c34\u63d0\u9ad8 10%\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE employees\nSET salary = salary * 1.1\nWHERE salary &lt; 30000;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u81ea\u52d5\u8a08\u7b97\u4e26\u66f4\u65b0\u6240\u6709\u7b26\u5408\u689d\u4ef6\u7684\u54e1\u5de5\u85aa\u6c34\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-NEFcALNWOp\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\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>\u6e2c\u8a66\u66f4\u65b0\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\uff0c\u4ee5\u78ba\u4fdd\u8a9e\u53e5\u7684\u6b63\u78ba\u6027\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5c0d\u65bc\u91cd\u8981\u7684\u6578\u64da\u66f4\u65b0\uff0c\u5efa\u8b70\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NEFcALNWOp\">\u7e3d\u7d50<\/h2>\n<p>SQL \u6578\u64da\u5eab\u7684\u6578\u64da\u66f4\u65b0\u64cd\u4f5c\u662f\u65e5\u5e38\u6578\u64da\u7ba1\u7406\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528 <code>UPDATE<\/code> \u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u9748\u6d3b\u5730\u66f4\u65b0\u55ae\u500b\u6216\u591a\u500b\u5b57\u6bb5\uff0c\u4e26\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u9032\u884c\u6279\u91cf\u66f4\u65b0\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u60a8\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684\u6578\u64da\u5eab\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u4f01\u696d\u9084\u662f\u5927\u578b\u4f01\u696d\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4f7f\u7528 SQL \u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u638c\u63e1\u57fa\u672c\u8a9e\u6cd5\u548c\u5be6\u7528\u7bc4\u4f8b\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-144037","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144037","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=144037"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144037\/revisions"}],"predecessor-version":[{"id":144038,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144037\/revisions\/144038"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=144037"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=144037"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=144037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}