{"id":160817,"date":"2024-11-04T01:15:25","date_gmt":"2024-11-03T17:15:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160817\/"},"modified":"2024-11-04T01:15:26","modified_gmt":"2024-11-03T17:15:26","slug":"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql-%e5%9f%b7%e8%a1%8c%e4%ba%8b%e5%8b%99%e7%9a%84%e8%aa%9e%e6%b3%95%e5%92%8c%e6%b5%81%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160817\/","title":{"rendered":"\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL \u57f7\u884c\u4e8b\u52d9\u7684\u8a9e\u6cd5\u548c\u6d41\u7a0b"},"content":{"rendered":"<h1 id=\"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql-%e5%9f%b7%e8%a1%8c%e4%ba%8b%e5%8b%99%e7%9a%84%e8%aa%9e%e6%b3%95%e5%92%8c%e6%b5%81%e7%a8%8b-yWntHsatNC\">\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL \u57f7\u884c\u4e8b\u52d9\u7684\u8a9e\u6cd5\u548c\u6d41\u7a0b<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u8cc7\u6599\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002MySQL \u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u4e8b\u52d9\u8655\u7406\u529f\u80fd\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u4e2d\u57f7\u884c\u4e8b\u52d9\u7684\u8a9e\u6cd5\u548c\u6d41\u7a0b\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e00\u529f\u80fd\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e4%ba%8b%e5%8b%99%ef%bc%9f-yWntHsatNC\">\u4ec0\u9ebc\u662f\u4e8b\u52d9\uff1f<\/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\u3002\u9019\u7a2e\u7279\u6027\u88ab\u7a31\u70ba\u539f\u5b50\u6027\uff08Atomicity\uff09\u3002\u5728\u8cc7\u6599\u5eab\u4e2d\uff0c\u4e8b\u52d9\u901a\u5e38\u7528\u65bc\u78ba\u4fdd\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002MySQL \u652f\u6301\u56db\u500b\u4e3b\u8981\u7684\u4e8b\u52d9\u7279\u6027\uff0c\u901a\u5e38\u7a31\u70ba ACID \u539f\u5247\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09<\/strong>\uff1a\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<\/strong>\uff1a\u4e8b\u52d9\u5fc5\u9808\u4f7f\u8cc7\u6599\u5eab\u5f9e\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027\uff08Isolation\uff09<\/strong>\uff1a\u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e0d\u61c9\u4e92\u76f8\u5e72\u64fe\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u662f\u6c38\u4e45\u6027\u7684\uff0c\u5373\u4f7f\u7cfb\u7d71\u5d29\u6f70\u4e5f\u4e0d\u6703\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"mysql-%e4%b8%ad%e7%9a%84%e4%ba%8b%e5%8b%99%e8%aa%9e%e6%b3%95-yWntHsatNC\">MySQL \u4e2d\u7684\u4e8b\u52d9\u8a9e\u6cd5<\/h2>\n<p>\u5728 MySQL \u4e2d\uff0c\u4e8b\u52d9\u7684\u57fa\u672c\u8a9e\u6cd5\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<pre><code>START TRANSACTION;  -- \u958b\u59cb\u4e8b\u52d9\n-- \u57f7\u884c SQL \u64cd\u4f5c\nCOMMIT;  -- \u63d0\u4ea4\u4e8b\u52d9\nROLLBACK;  -- \u56de\u6efe\u4e8b\u52d9\n<\/code><\/pre>\n<h3 id=\"1-%e9%96%8b%e5%a7%8b%e4%ba%8b%e5%8b%99-yWntHsatNC\">1. \u958b\u59cb\u4e8b\u52d9<\/h3>\n<p>\u4f7f\u7528 <code>START TRANSACTION;<\/code> \u6216 <code>BEGIN;<\/code> \u958b\u59cb\u4e00\u500b\u65b0\u7684\u4e8b\u52d9\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>START TRANSACTION;\n<\/code><\/pre>\n<h3 id=\"2-%e5%9f%b7%e8%a1%8c-sql-%e6%93%8d%e4%bd%9c-yWntHsatNC\">2. \u57f7\u884c SQL \u64cd\u4f5c<\/h3>\n<p>\u5728\u4e8b\u52d9\u4e2d\uff0c\u53ef\u4ee5\u57f7\u884c\u591a\u500b SQL \u64cd\u4f5c\uff0c\u4f8b\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u8cc7\u6599\u3002\u9019\u4e9b\u64cd\u4f5c\u5728\u4e8b\u52d9\u63d0\u4ea4\u4e4b\u524d\u4e0d\u6703\u5c0d\u8cc7\u6599\u5eab\u7522\u751f\u6c38\u4e45\u5f71\u97ff\u3002<\/p>\n<pre><code>INSERT INTO accounts (user_id, balance) VALUES (1, 1000);\nUPDATE accounts SET balance = balance - 100 WHERE user_id = 1;\nUPDATE accounts SET balance = balance + 100 WHERE user_id = 2;\n<\/code><\/pre>\n<h3 id=\"3-%e6%8f%90%e4%ba%a4%e4%ba%8b%e5%8b%99-yWntHsatNC\">3. \u63d0\u4ea4\u4e8b\u52d9<\/h3>\n<p>\u5982\u679c\u6240\u6709\u64cd\u4f5c\u90fd\u6210\u529f\uff0c\u4f7f\u7528 <code>COMMIT;<\/code> \u63d0\u4ea4\u4e8b\u52d9\uff0c\u5c07\u6240\u6709\u8b8a\u66f4\u6c38\u4e45\u4fdd\u5b58\u5230\u8cc7\u6599\u5eab\u4e2d\uff1a<\/p>\n<pre><code>COMMIT;\n<\/code><\/pre>\n<h3 id=\"4-%e5%9b%9e%e6%bb%be%e4%ba%8b%e5%8b%99-yWntHsatNC\">4. \u56de\u6efe\u4e8b\u52d9<\/h3>\n<p>\u5982\u679c\u5728\u4e8b\u52d9\u57f7\u884c\u904e\u7a0b\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ROLLBACK;<\/code> \u5c07\u6240\u6709\u8b8a\u66f4\u64a4\u92b7\uff0c\u6062\u5fa9\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\uff1a<\/p>\n<pre><code>ROLLBACK;\n<\/code><\/pre>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-yWntHsatNC\">\u4e8b\u52d9\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5b8c\u6574\u7684\u4e8b\u52d9\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 MySQL \u4e2d\u5b89\u5168\u5730\u8f49\u5e33\uff1a<\/p>\n<pre><code>START TRANSACTION;\n\nUPDATE accounts SET balance = balance - 100 WHERE user_id = 1;\nUPDATE accounts SET balance = balance + 100 WHERE user_id = 2;\n\nIF (SELECT balance FROM accounts WHERE user_id = 1) &lt; 0 THEN\n    ROLLBACK;\nELSE\n    COMMIT;\nEND IF;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u9996\u5148\u5f9e\u7528\u6236 1 \u7684\u5e33\u6236\u4e2d\u6263\u9664 100\uff0c\u7136\u5f8c\u5c07\u5176\u6dfb\u52a0\u5230\u7528\u6236 2 \u7684\u5e33\u6236\u4e2d\u3002\u5982\u679c\u7528\u6236 1 \u7684\u9918\u984d\u4e0d\u8db3\u4ee5\u9032\u884c\u8f49\u5e33\uff0c\u5247\u56de\u6efe\u4e8b\u52d9\uff0c\u5426\u5247\u63d0\u4ea4\u4e8b\u52d9\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-yWntHsatNC\">\u7d50\u8ad6<\/h2>\n<p>MySQL \u7684\u4e8b\u52d9\u8655\u7406\u529f\u80fd\u70ba\u8cc7\u6599\u5eab\u64cd\u4f5c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u4fdd\u969c\uff0c\u78ba\u4fdd\u4e86\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u4e8b\u52d9\u8a9e\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6599\u5eab\u4e2d\u7684\u8907\u96dc\u64cd\u4f5c\uff0c\u907f\u514d\u8cc7\u6599\u640d\u58de\u6216\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u61c9\u7528\u4e2d\u4f7f\u7528 MySQL \u9032\u884c\u4e8b\u52d9\u8655\u7406\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u57f7\u884c\u4e8b\u52d9\u7684\u8a9e\u6cd5\u548c\u6d41\u7a0b\uff0c\u638c\u63e1\u8cc7\u6599\u5eab\u64cd\u4f5c\u7684\u95dc\u9375\u6280\u5de7\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-160817","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160817","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=160817"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160817\/revisions"}],"predecessor-version":[{"id":160818,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160817\/revisions\/160818"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}