{"id":160031,"date":"2024-11-03T19:42:18","date_gmt":"2024-11-03T11:42:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160031\/"},"modified":"2024-11-03T19:42:20","modified_gmt":"2024-11-03T11:42:20","slug":"mysql-%e6%95%99%e7%a8%8b-mysql-update-%e6%9b%b4%e6%96%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160031\/","title":{"rendered":"MYSQL \u6559\u7a0b MySQL UPDATE \u66f4\u65b0"},"content":{"rendered":"<h1 id=\"mysql-%e6%95%99%e7%a8%8b%ef%bc%9amysql-update-%e6%9b%b4%e6%96%b0-HOxuVRPIZh\">MySQL \u6559\u7a0b\uff1aMySQL UPDATE \u66f4\u65b0<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL \u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u64cd\u4f5c\u4e4b\u4e00\u5c31\u662f\u66f4\u65b0\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u4e2d\u7684 UPDATE \u8a9e\u53e5\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5982\u4f55\u6709\u6548\u5730\u66f4\u65b0\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-update-%e8%aa%9e%e5%8f%a5%ef%bc%9f-HOxuVRPIZh\">\u4ec0\u9ebc\u662f UPDATE \u8a9e\u53e5\uff1f<\/h2>\n<p>UPDATE \u8a9e\u53e5\u7528\u65bc\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u5df2\u5b58\u5728\u7684\u8a18\u9304\u3002\u901a\u904e\u9019\u500b\u8a9e\u53e5\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u66f4\u65b0\u4e00\u500b\u6216\u591a\u500b\u5b57\u6bb5\u7684\u503c\u3002\u9019\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u662f\u975e\u5e38\u5e38\u898b\u7684\u64cd\u4f5c\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u4fee\u6b63\u6216\u66f4\u65b0\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"update-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-HOxuVRPIZh\">UPDATE \u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<pre><code>UPDATE \u8868\u540d\nSET \u52171 = \u503c1, \u52172 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<strong>\u8868\u540d<\/strong> \u662f\u8981\u66f4\u65b0\u7684\u6578\u64da\u8868\uff0c<strong>\u52171, \u52172<\/strong> \u662f\u8981\u66f4\u65b0\u7684\u5b57\u6bb5\uff0c\u800c<strong>\u503c1, \u503c2<\/strong> \u662f\u65b0\u7684\u6578\u64da\u503c\u3002<strong>WHERE<\/strong> \u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u54ea\u4e9b\u8a18\u9304\u9700\u8981\u88ab\u66f4\u65b0\uff0c\u9019\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u70ba\u5982\u679c\u4e0d\u4f7f\u7528 WHERE \u5b50\u53e5\uff0c\u6240\u6709\u8a18\u9304\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"update-%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%a4%ba%e4%be%8b-HOxuVRPIZh\">UPDATE \u8a9e\u53e5\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 UPDATE \u8a9e\u53e5\u4f86\u66f4\u65b0\u6578\u64da\uff1a<\/p>\n<pre><code>UPDATE customers\nSET email = 'newemail@example.com'\nWHERE customer_id = 1;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07 <strong>customers<\/strong> \u8868\u4e2d <strong>customer_id<\/strong> \u70ba 1 \u7684\u5ba2\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u66f4\u65b0\u70ba &#8216;newemail@example.com&#8217;\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%a4%9a%e5%80%8b%e6%a2%9d%e4%bb%b6%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-HOxuVRPIZh\">\u4f7f\u7528\u591a\u500b\u689d\u4ef6\u66f4\u65b0\u6578\u64da<\/h2>\n<p>\u6709\u6642\u5019\uff0c\u6211\u5011\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u4f86\u66f4\u65b0\u6578\u64da\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728 WHERE \u5b50\u53e5\u4e2d\u4f7f\u7528 AND \u6216 OR \u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>UPDATE products\nSET price = price * 0.9\nWHERE category = 'Electronics' AND stock &gt; 100;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07 <strong>products<\/strong> \u8868\u4e2d\u6240\u6709\u985e\u5225\u70ba &#8216;Electronics&#8217; \u4e14\u5eab\u5b58\u5927\u65bc 100 \u7684\u7522\u54c1\u50f9\u683c\u6e1b\u5c11 10%\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-HOxuVRPIZh\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u57f7\u884c UPDATE \u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\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\u4e4b\u524d\uff0c\u53ef\u4ee5\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u5148\u9032\u884c\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u66f4\u65b0\u7684\u6b63\u78ba\u6027\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5728\u9700\u8981\u9032\u884c\u591a\u500b\u66f4\u65b0\u64cd\u4f5c\u6642\uff0c\u8003\u616e\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-HOxuVRPIZh\">\u7d50\u8ad6<\/h2>\n<p>MySQL \u7684 UPDATE \u8a9e\u53e5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u7ba1\u7406\u548c\u66f4\u65b0\u6578\u64da\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528 UPDATE \u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u3002\u5728\u9032\u884c\u66f4\u65b0\u64cd\u4f5c\u6642\uff0c\u52d9\u5fc5\u8b39\u614e\uff0c\u4e26\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u640d\u5931\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u4f86\u63d0\u5347\u60a8\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002\u7121\u8ad6\u662f\u9700\u8981\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u76f8\u61c9\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60\u5982\u4f55\u4f7f\u7528 MySQL UPDATE \u8bed\u53e5\u66f4\u65b0\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\uff0c\u638c\u63e1\u57fa\u672c\u8bed\u6cd5\u548c\u5b9e\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6570\u636e\u5e93\u7ba1\u7406\u80fd\u529b\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-160031","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160031","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=160031"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160031\/revisions"}],"predecessor-version":[{"id":160032,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160031\/revisions\/160032"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160031"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}