{"id":152083,"date":"2024-11-01T19:58:21","date_gmt":"2024-11-01T11:58:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152083\/"},"modified":"2024-11-01T19:58:21","modified_gmt":"2024-11-01T11:58:21","slug":"%e9%81%bf%e5%85%8dmysql%e6%9b%bf%e6%8f%9b%e9%82%8f%e8%bc%afsql%e7%9a%84%e5%9d%91%e7%88%b9%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152083\/","title":{"rendered":"\u907f\u514dMySQL\u66ff\u63db\u908f\u8f2fSQL\u7684\u5751\u7239\u64cd\u4f5c"},"content":{"rendered":"<h1 id=\"%e9%81%bf%e5%85%8dmysql%e6%9b%bf%e6%8f%9b%e9%82%8f%e8%bc%afsql%e7%9a%84%e5%9d%91%e7%88%b9%e6%93%8d%e4%bd%9c-LJkbtugVxg\">\u907f\u514dMySQL\u66ff\u63db\u908f\u8f2fSQL\u7684\u5751\u7239\u64cd\u4f5c<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u9700\u8981\u9032\u884c\u6578\u64da\u66ff\u63db\u7684\u60c5\u6cc1\u3002\u96d6\u7136MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\uff0c\u4f46\u4e0d\u7576\u7684\u4f7f\u7528\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u640d\u5931\u6216\u6027\u80fd\u554f\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728MySQL\u4e2d\u9032\u884c\u6578\u64da\u66ff\u63db\u6642\u5e38\u898b\u7684\u5751\u7239\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u4ee5\u907f\u514d\u9019\u4e9b\u554f\u984c\u3002<\/p>\n<h2 id=\"mysql%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e6%9b%bf%e6%8f%9b%e6%96%b9%e6%b3%95-LJkbtugVxg\">MySQL\u4e2d\u7684\u6578\u64da\u66ff\u63db\u65b9\u6cd5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u6578\u64da\u66ff\u63db\u4e3b\u8981\u6709\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><code>REPLACE<\/code>\u51fd\u6578<\/li>\n<li><code>UPDATE<\/code>\u8a9e\u53e5<\/li>\n<li><code>INSERT ... ON DUPLICATE KEY UPDATE<\/code>\u8a9e\u53e5<\/li>\n<\/ul>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8replace%e5%87%bd%e6%95%b8-LJkbtugVxg\">1. \u4f7f\u7528REPLACE\u51fd\u6578<\/h3>\n<p><code>REPLACE<\/code>\u51fd\u6578\u7528\u65bc\u66ff\u63db\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e9b\u5b57\u7b26\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>REPLACE(str, from_str, to_str)<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u8a9e\u53e5\u5c07\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u201capple\u201d\u66ff\u63db\u70ba\u201corange\u201d\uff1a<\/p>\n<pre><code>SELECT REPLACE('I like apple', 'apple', 'orange');<\/code><\/pre>\n<p>\u7136\u800c\uff0c\u4f7f\u7528<code>REPLACE<\/code>\u51fd\u6578\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u5176\u4e0d\u6703\u5c0dNULL\u503c\u9032\u884c\u8655\u7406\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u610f\u5916\u7684\u7d50\u679c\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8update%e8%aa%9e%e5%8f%a5-LJkbtugVxg\">2. \u4f7f\u7528UPDATE\u8a9e\u53e5<\/h3>\n<p>\u7576\u9700\u8981\u66f4\u65b0\u8868\u4e2d\u7684\u6578\u64da\u6642\uff0c<code>UPDATE<\/code>\u8a9e\u53e5\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE table_name SET column1 = value1, column2 = value2 WHERE condition;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u8a9e\u53e5\u5c07\u201cusers\u201d\u8868\u4e2d\u6240\u6709\u5e74\u9f61\u70ba25\u7684\u7528\u6236\u7684\u5e74\u9f61\u66f4\u65b0\u70ba26\uff1a<\/p>\n<pre><code>UPDATE users SET age = 26 WHERE age = 25;<\/code><\/pre>\n<p>\u5728\u4f7f\u7528<code>UPDATE<\/code>\u6642\uff0c\u958b\u767c\u8005\u5fc5\u9808\u5c0f\u5fc3\u689d\u4ef6\u7684\u8a2d\u7f6e\uff0c\u5426\u5247\u53ef\u80fd\u6703\u610f\u5916\u66f4\u65b0\u4e0d\u61c9\u8a72\u66f4\u6539\u7684\u6578\u64da\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8insert-on-duplicate-key-update-LJkbtugVxg\">3. \u4f7f\u7528INSERT &#8230; ON DUPLICATE KEY UPDATE<\/h3>\n<p>\u9019\u7a2e\u65b9\u6cd5\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u5982\u679c\u9047\u5230\u4e3b\u9375\u885d\u7a81\uff0c\u5247\u6703\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>INSERT INTO table_name (column1, column2) VALUES (value1, value2) ON DUPLICATE KEY UPDATE column1 = value1;<\/code><\/pre>\n<p>\u9019\u7a2e\u65b9\u6cd5\u5728\u9700\u8981\u4fdd\u8b49\u6578\u64da\u552f\u4e00\u6027\u6642\u975e\u5e38\u6709\u7528\uff0c\u4f46\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u66f4\u65b0\u7684\u908f\u8f2f\u6b63\u78ba\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u8986\u84cb\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e5%9d%91%e7%88%b9%e6%93%8d%e4%bd%9c-LJkbtugVxg\">\u5e38\u898b\u7684\u5751\u7239\u64cd\u4f5c<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u66ff\u63db\u6642\uff0c\u958b\u767c\u8005\u5e38\u5e38\u6703\u72af\u4ee5\u4e0b\u5e7e\u500b\u932f\u8aa4\uff1a<\/p>\n<ul>\n<li><strong>\u672a\u8a2d\u7f6eWHERE\u689d\u4ef6\uff1a<\/strong>\u5728\u4f7f\u7528<code>UPDATE<\/code>\u6642\uff0c\u5982\u679c\u672a\u8a2d\u7f6e<code>WHERE<\/code>\u689d\u4ef6\uff0c\u5c07\u6703\u5c0e\u81f4\u6574\u500b\u8868\u7684\u6578\u64da\u88ab\u66f4\u65b0\u3002<\/li>\n<li><strong>\u5ffd\u7565NULL\u503c\uff1a<\/strong>\u5728\u4f7f\u7528<code>REPLACE<\/code>\u51fd\u6578\u6642\uff0cNULL\u503c\u4e0d\u6703\u88ab\u66ff\u63db\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u610f\u5916\u7684\u7d50\u679c\u3002<\/li>\n<li><strong>\u4e0d\u7576\u4f7f\u7528INSERT &#8230; ON DUPLICATE KEY UPDATE\uff1a<\/strong>\u5982\u679c\u66f4\u65b0\u7684\u908f\u8f2f\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u7684\u610f\u5916\u8986\u84cb\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-LJkbtugVxg\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u70ba\u4e86\u907f\u514d\u4e0a\u8ff0\u554f\u984c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9075\u5faa\u4ee5\u4e0b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u5728\u57f7\u884c<code>UPDATE<\/code>\u8a9e\u53e5\u4e4b\u524d\uff0c\u5148\u9032\u884c<code>SELECT<\/code>\u67e5\u8a62\u4ee5\u78ba\u8a8d\u5c07\u8981\u66f4\u65b0\u7684\u6578\u64da\u3002<\/li>\n<li>\u4f7f\u7528\u4e8b\u52d9\u4f86\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u591a\u6b65\u9a5f\u7684\u6578\u64da\u66ff\u63db\u6642\u3002<\/li>\n<li>\u5b9a\u671f\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u56e0\u64cd\u4f5c\u5931\u8aa4\u800c\u5c0e\u81f4\u7684\u6578\u64da\u640d\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LJkbtugVxg\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\u9032\u884c\u6578\u64da\u66ff\u63db\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u8b39\u614e\u9078\u64c7\u65b9\u6cd5\u4e26\u6ce8\u610f\u5e38\u898b\u7684\u5751\u7239\u64cd\u4f5c\u3002\u901a\u904e\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6578\u64da\u640d\u5931\u548c\u6027\u80fd\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u660e\u667a\u7684\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u907f\u514dMySQL\u66ff\u63db\u908f\u8f2fSQL\u7684\u5751\u7239\u64cd\u4f5c\uff0c\u638c\u63e1\u6b63\u78ba\u7528\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u6e1b\u5c11\u932f\u8aa4\u767c\u751f\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-152083","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152083","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=152083"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152083\/revisions"}],"predecessor-version":[{"id":152084,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152083\/revisions\/152084"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}