{"id":200614,"date":"2025-05-06T10:24:24","date_gmt":"2025-05-06T02:24:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200614\/"},"modified":"2025-05-06T10:24:24","modified_gmt":"2025-05-06T02:24:24","slug":"%e5%a6%82%e4%bd%95%e4%bc%98%e5%8c%96-mysql-update-%e6%93%8d%e4%bd%9c%ef%bc%8c%e9%81%bf%e5%85%8d%e6%ad%bb%e9%94%81%e5%b9%b6%e6%8f%90%e5%8d%87%e6%80%a7%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200614\/","title":{"rendered":"\u5982\u4f55\u4f18\u5316 MySQL UPDATE \u64cd\u4f5c\uff0c\u907f\u514d\u6b7b\u9501\u5e76\u63d0\u5347\u6027\u80fd\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u4f18\u5316 MySQL UPDATE \u64cd\u4f5c\uff0c\u907f\u514d\u6b7b\u9501\u5e76\u63d0\u5347\u6027\u80fd\uff1f<\/h1>\n<p>\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241109\/1731155808672f57608dd1d.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>MySQL UPDATE \u7684\u5e95\u5c42\u539f\u7406\u4e0e\u6027\u80fd\u4f18\u5316<\/strong><\/p>\n<p>\u5f53\u6211\u4eec\u9700\u8981\u66f4\u65b0\u6570\u636e\u5e93\u4e2d\u5927\u91cf\u884c\u65f6\uff0c memahami\u5e95\u5c42\u539f\u7406\u548c\u6027\u80fd\u4f18\u5316\u6280\u5de7\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f MySQL UPDATE \u64cd\u4f5c\u7684\u5185\u90e8\u5de5\u4f5c\u539f\u7406\u4ee5\u53ca\u4f18\u5316\u63d0\u793a\uff1a<\/p>\n<p><strong>\u5e95\u5c42\u903b\u8f91\uff1a<\/strong><\/p>\n<p>MySQL \u4f7f\u7528\u884c\u7ea7\u9501\u5b9a\u7684\u7d22\u5f15\u7ec4\u7ec7\u8868 (IOT) \u5f15\u64ce\u6765\u5904\u7406 UPDATE \u64cd\u4f5c\u3002\u5f53\u6267\u884c UPDATE \u65f6\uff0c\u6570\u636e\u5e93\u4f1a\u5148\u83b7\u53d6\u8981\u66f4\u65b0\u884c\u7684\u884c\u9501\u3002\u7136\u540e\uff0c\u5b83\u4f1a\u8bfb\u53d6\u65e7\u7684\u884c\u503c\uff0c\u5e94\u7528\u66f4\u65b0\uff0c\u5e76\u7528\u65b0\u503c\u66f4\u65b0\u884c\u3002<\/p>\n<p><strong>\u6027\u80fd\u4f18\u5316\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong> \u5728\u7528\u4e8e WHERE \u5b50\u53e5\u7684\u5217\u4e0a\u521b\u5efa\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u884c\u67e5\u627e\u8fc7\u7a0b\u3002<\/li>\n<li><strong>\u907f\u514d\u66f4\u65b0\u5bc6\u96c6\u7684\u5b57\u6bb5\uff1a<\/strong> \u4ec5\u66f4\u65b0\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u4ee5\u51cf\u5c11 I\/O \u64cd\u4f5c\u7684\u6570\u91cf\u3002<\/li>\n<li><strong>\u4f7f\u7528\u6279\u91cf\u66f4\u65b0\uff1a<\/strong> \u901a\u8fc7\u5c06\u591a\u4e2a\u66f4\u65b0\u8bed\u53e5\u7ec4\u5408\u5230\u4e00\u4e2a\u4e8b\u52a1\u4e2d\u6765\u51cf\u5c11\u9501\u4e89\u7528\u3002<\/li>\n<li><strong>\u8003\u8651\u5206\u8868\uff1a<\/strong> \u5c06\u6570\u636e\u62c6\u5206\u4e3a\u591a\u4e2a\u8868\u53ef\u4ee5\u63d0\u9ad8\u5e76\u53d1\u6027\u5e76\u51cf\u5c11\u6b7b\u9501\u7684\u53ef\u80fd\u6027\u3002<\/li>\n<\/ul>\n<p><strong>\u4e8b\u52a1\u4e2d\u5927\u6279\u91cf\u6570\u636e\u66f4\u65b0\u4e0e\u6b7b\u9501\uff1a<\/strong><\/p>\n<p>\u5728\u4e8b\u52a1\u4e2d\u66f4\u65b0\u5927\u91cf\u6570\u636e\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6b7b\u9501\uff0c\u5c24\u5176\u662f\u5728\u6570\u636e\u7ade\u4e89\u9ad8\u7684\u60c5\u51b5\u4e0b\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u8003\u8651\u4ee5\u4e0b\u7b56\u7565\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u60b2\u89c2\u9501\uff1a<\/strong> \u5728\u4e8b\u52a1\u5f00\u59cb\u65f6\u83b7\u53d6\u9501\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u66f4\u65b0\u76f8\u540c\u7684\u6570\u636e\u3002<\/li>\n<li><strong>\u4f7f\u7528\u975e\u963b\u585e\u7b97\u6cd5\uff1a<\/strong> \u4f7f\u7528\u5141\u8bb8\u5176\u4ed6\u4e8b\u52a1\u540c\u65f6\u66f4\u65b0\u76f8\u540c\u6570\u636e\uff08\u4f8b\u5982 MVCC\uff09\u7684\u5e76\u53d1 control \u7b97\u6cd5\u3002<\/li>\n<li><strong>\u4f18\u5316\u67e5\u8be2\uff1a<\/strong> \u4f7f\u7528\u7d22\u5f15\u548c\u9ad8\u6548\u7684\u67e5\u8be2\u6765\u51cf\u5c11\u9501\u7b49\u5f85\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p>\u7406\u89e3 MySQL UPDATE \u7684\u5e95\u5c42\u539f\u7406\u548c\u6027\u80fd\u4f18\u5316\u6280\u5de7\u53ef\u4ee5 nos permita\u5145\u5206\u5229\u7528\u6570\u636e\u5e93\u5e76\u907f\u514d\u51fa\u73b0\u6b7b\u9501\u548c\u5176\u4ed6\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<p>\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6570\u636e\u5e93\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4f18\u5316 MySQL UPDAT&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200614","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200614","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200614"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200614\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}