{"id":180956,"date":"2024-11-09T14:35:17","date_gmt":"2024-11-09T06:35:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180956\/"},"modified":"2024-11-09T14:35:18","modified_gmt":"2024-11-09T06:35:18","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3mysql-%e9%8e%96%e3%80%81%e4%ba%8b%e5%8b%99%e8%88%87%e4%b8%a6%e7%99%bc%e6%8e%a7%e5%88%b6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180956\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3MySQL\u2014\u2014\u9396\u3001\u4e8b\u52d9\u8207\u4e26\u767c\u63a7\u5236"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3mysql-%e9%8e%96%e3%80%81%e4%ba%8b%e5%8b%99%e8%88%87%e4%b8%a6%e7%99%bc%e6%8e%a7%e5%88%b6-tPgEQMjYRc\">\u6df1\u5165\u7406\u89e3MySQL\u2014\u2014\u9396\u3001\u4e8b\u52d9\u8207\u4e26\u767c\u63a7\u5236<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7406\u89e3MySQL\u7684\u9396\u3001\u4e8b\u52d9\u548c\u4e26\u767c\u63a7\u5236\u5c0d\u65bc\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\uff0c\u56e0\u70ba\u9019\u4e9b\u6982\u5ff5\u76f4\u63a5\u5f71\u97ff\u5230\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u7cfb\u7d71\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e9%8e%96%e7%9a%84%e6%a6%82%e5%bf%b5-tPgEQMjYRc\">\u9396\u7684\u6982\u5ff5<\/h2>\n<p>\u9396\u662f\u7528\u4f86\u63a7\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002\u5728MySQL\u4e2d\uff0c\u9396\u4e3b\u8981\u5206\u70ba\u5169\u7a2e\u985e\u578b\uff1a\u884c\u9396\u548c\u8868\u9396\u3002<\/p>\n<ul>\n<li><strong>\u884c\u9396\uff1a<\/strong>\u884c\u9396\u662f\u91dd\u5c0d\u7279\u5b9a\u884c\u7684\u9396\u5b9a\uff0c\u9019\u6a23\u53ef\u4ee5\u5141\u8a31\u5176\u4ed6\u4e8b\u52d9\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8868\u4e2d\u7684\u5176\u4ed6\u884c\u3002\u884c\u9396\u7684\u512a\u9ede\u5728\u65bc\u63d0\u9ad8\u4e86\u4e26\u767c\u6027\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\u3002<\/li>\n<li><strong>\u8868\u9396\uff1a<\/strong>\u8868\u9396\u662f\u91dd\u5c0d\u6574\u500b\u8868\u7684\u9396\u5b9a\uff0c\u9019\u610f\u5473\u8457\u5728\u4e00\u500b\u4e8b\u52d9\u57f7\u884c\u671f\u9593\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u8a2a\u554f\u8a72\u8868\u3002\u8868\u9396\u7684\u512a\u9ede\u662f\u5be6\u73fe\u7c21\u55ae\uff0c\u4f46\u5728\u9ad8\u4e26\u767c\u60c5\u6cc1\u4e0b\u6703\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\u3002<\/li>\n<\/ul>\n<p>\u5728MySQL\u4e2d\uff0c\u9396\u7684\u7ba1\u7406\u662f\u81ea\u52d5\u7684\uff0c\u4f46\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u624b\u52d5\u63a7\u5236\u9396\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u4f86\u986f\u5f0f\u9396\u5b9a\u4e00\u884c\uff1a<\/p>\n<pre><code>SELECT * FROM table_name WHERE condition FOR UPDATE;<\/code><\/pre>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e6%a6%82%e5%bf%b5-tPgEQMjYRc\">\u4e8b\u52d9\u7684\u6982\u5ff5<\/h2>\n<p>\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002MySQL\u652f\u6301ACID\u7279\u6027\uff0c\u78ba\u4fdd\u4e8b\u52d9\u7684\u53ef\u9760\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09\uff1a<\/strong>\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u57f7\u884c\uff0c\u8981\u9ebc\u5168\u90e8\u4e0d\u57f7\u884c\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\uff08Consistency\uff09\uff1a<\/strong>\u4e8b\u52d9\u7684\u57f7\u884c\u5fc5\u9808\u4f7f\u6578\u64da\u5eab\u5f9e\u4e00\u500b\u4e00\u81f4\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027\uff08Isolation\uff09\uff1a<\/strong>\u4e8b\u52d9\u7684\u57f7\u884c\u4e0d\u61c9\u53d7\u5230\u5176\u4ed6\u4e8b\u52d9\u7684\u5f71\u97ff\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09\uff1a<\/strong>\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u61c9\u6c38\u4e45\u4fdd\u5b58\u5728\u6578\u64da\u5eab\u4e2d\u3002<\/li>\n<\/ul>\n<p>\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u4f86\u958b\u59cb\u548c\u63d0\u4ea4\u4e8b\u52d9\uff1a<\/p>\n<pre><code>START TRANSACTION;\n-- SQL\u64cd\u4f5c\nCOMMIT;<\/code><\/pre>\n<h2 id=\"%e4%b8%a6%e7%99%bc%e6%8e%a7%e5%88%b6-tPgEQMjYRc\">\u4e26\u767c\u63a7\u5236<\/h2>\n<p>\u4e26\u767c\u63a7\u5236\u662f\u6307\u5728\u591a\u500b\u4e8b\u52d9\u540c\u6642\u57f7\u884c\u6642\uff0c\u5982\u4f55\u4fdd\u8b49\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u4e26\u767c\u63a7\u5236\u6a5f\u5236\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u60b2\u89c0\u9396\uff08Pessimistic Locking\uff09\uff1a<\/strong>\u5728\u64cd\u4f5c\u6578\u64da\u4e4b\u524d\uff0c\u5148\u5c0d\u6578\u64da\u52a0\u9396\uff0c\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u5c0d\u8a72\u6578\u64da\u7684\u8a2a\u554f\u3002<\/li>\n<li><strong>\u6a02\u89c0\u9396\uff08Optimistic Locking\uff09\uff1a<\/strong>\u5728\u64cd\u4f5c\u6578\u64da\u6642\u4e0d\u52a0\u9396\uff0c\u800c\u662f\u5728\u63d0\u4ea4\u6642\u6aa2\u67e5\u6578\u64da\u662f\u5426\u88ab\u5176\u4ed6\u4e8b\u52d9\u4fee\u6539\u904e\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u8b80\u53d6\u591a\u65bc\u5beb\u5165\u7684\u5834\u666f\u3002<\/li>\n<\/ul>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528\u7248\u672c\u865f\u6216\u6642\u9593\u6233\u4f86\u5be6\u73fe\u6a02\u89c0\u9396\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u7248\u672c\u865f\u5b57\u6bb5\uff0c\u7136\u5f8c\u5728\u66f4\u65b0\u6642\u6aa2\u67e5\u7248\u672c\u865f\u662f\u5426\u4e00\u81f4\uff1a<\/p>\n<pre><code>UPDATE table_name SET column1 = value1, version = version + 1 WHERE id = ? AND version = ?;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-tPgEQMjYRc\">\u7e3d\u7d50<\/h2>\n<p>\u7406\u89e3MySQL\u4e2d\u7684\u9396\u3001\u4e8b\u52d9\u548c\u4e26\u767c\u63a7\u5236\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u6027\u80fd\u548c\u6578\u64da\u5b8c\u6574\u6027\u7684\u95dc\u9375\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u9396\u548c\u4e8b\u52d9\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u7684\u8a2a\u554f\u548c\u4fee\u6539\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u66f4\u597d\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u7406\u89e3MySQL\u7684\u9396\u3001\u4e8b\u52d9\u8207\u4e26\u767c\u63a7\u5236\uff0c\u638c\u63e1\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u8207\u6578\u64da\u4e00\u81f4\u6027\uff0c\u63d0\u5347\u958b\u767c\u8207\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-180956","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180956","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=180956"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180956\/revisions"}],"predecessor-version":[{"id":180957,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180956\/revisions\/180957"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}