{"id":162767,"date":"2024-11-04T17:50:23","date_gmt":"2024-11-04T09:50:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162767\/"},"modified":"2024-11-04T17:50:24","modified_gmt":"2024-11-04T09:50:24","slug":"%e9%99%8d%e4%bd%8e%e9%8e%96%e7%ab%b6%e7%88%ad%e6%b8%9b%e5%b0%91mysql%e7%94%a8%e6%88%b6%e7%ad%89%e5%be%85%e6%99%82%e9%96%93","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162767\/","title":{"rendered":"\u964d\u4f4e\u9396\u7af6\u722d\u6e1b\u5c11MySQL\u7528\u6236\u7b49\u5f85\u6642\u9593"},"content":{"rendered":"<h1 id=\"%e9%99%8d%e4%bd%8e%e9%8e%96%e7%ab%b6%e7%88%ad%e6%b8%9b%e5%b0%91mysql%e7%94%a8%e6%88%b6%e7%ad%89%e5%be%85%e6%99%82%e9%96%93-TgHQvydAZz\">\u964d\u4f4e\u9396\u7af6\u722d\u6e1b\u5c11MySQL\u7528\u6236\u7b49\u5f85\u6642\u9593<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u80fd\u81f3\u95dc\u91cd\u8981\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u7db2\u7ad9\u548c\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7136\u800c\uff0c\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\u548c\u6578\u64da\u91cf\u7684\u64f4\u5927\uff0cMySQL\u7684\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u7279\u5225\u662f\u5728\u9396\u7af6\u722d\u65b9\u9762\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u964d\u4f4e\u9396\u7af6\u722d\uff0c\u5f9e\u800c\u6e1b\u5c11MySQL\u7528\u6236\u7684\u7b49\u5f85\u6642\u9593\u3002<\/p>\n<h2 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id=\"%e9%8e%96%e7%9a%84%e9%a1%9e%e5%9e%8b-TgHQvydAZz\">\u9396\u7684\u985e\u578b<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4e3b\u8981\u6709\u5169\u7a2e\u9396\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\u5141\u8a31\u5176\u4ed6\u4e8b\u52d9\u8a2a\u554f\u540c\u4e00\u8868\u4e2d\u7684\u5176\u4ed6\u884c\u3002\u9019\u7a2e\u9396\u5b9a\u65b9\u5f0f\u901a\u5e38\u80fd\u5920\u63d0\u9ad8\u4e26\u767c\u6027\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u4ecd\u7136\u53ef\u80fd\u5c0e\u81f4\u9396\u7af6\u722d\u3002<\/li>\n<li><strong>\u8868\u9396\uff1a<\/strong>\u8868\u9396\u662f\u91dd\u5c0d\u6574\u500b\u8868\u7684\u9396\u5b9a\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u5c0d\u8868\u9032\u884c\u64cd\u4f5c\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u5fc5\u9808\u7b49\u5f85\uff0c\u9019\u6703\u986f\u8457\u964d\u4f4e\u4e26\u767c\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%99%8d%e4%bd%8e%e9%8e%96%e7%ab%b6%e7%88%ad%e7%9a%84%e7%ad%96%e7%95%a5-TgHQvydAZz\">\u964d\u4f4e\u9396\u7af6\u722d\u7684\u7b56\u7565<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e8%a1%8c%e9%8e%96%e8%80%8c%e9%9d%9e%e8%a1%a8%e9%8e%96-TgHQvydAZz\">1. \u4f7f\u7528\u884c\u9396\u800c\u975e\u8868\u9396<\/h3>\n<p>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u61c9\u512a\u5148\u8003\u616e\u4f7f\u7528\u884c\u9396\u3002\u9019\u53ef\u4ee5\u901a\u904e\u9069\u7576\u7684\u7d22\u5f15\u8a2d\u8a08\u4f86\u5be6\u73fe\uff0c\u5f9e\u800c\u6e1b\u5c11\u9396\u5b9a\u7684\u7bc4\u570d\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e3b\u9375\u6216\u552f\u4e00\u7d22\u5f15\u4f86\u9396\u5b9a\u7279\u5b9a\u884c\uff0c\u800c\u4e0d\u662f\u6574\u500b\u8868\u3002<\/p>\n<pre><code>SELECT * FROM users WHERE id = 1 FOR UPDATE;<\/code><\/pre>\n<h3 id=\"2-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2-TgHQvydAZz\">2. \u512a\u5316\u67e5\u8a62<\/h3>\n<p>\u512a\u5316SQL\u67e5\u8a62\u53ef\u4ee5\u6e1b\u5c11\u4e8b\u52d9\u7684\u57f7\u884c\u6642\u9593\uff0c\u5f9e\u800c\u964d\u4f4e\u9396\u7af6\u722d\u3002\u4f7f\u7528EXPLAIN\u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u78ba\u4fdd\u67e5\u8a62\u80fd\u5920\u6709\u6548\u5229\u7528\u7d22\u5f15\u3002<\/p>\n<pre><code>EXPLAIN SELECT * FROM orders WHERE user_id = 1;<\/code><\/pre>\n<h3 id=\"3-%e6%b8%9b%e5%b0%91%e4%ba%8b%e5%8b%99%e7%9a%84%e7%af%84%e5%9c%8d-TgHQvydAZz\">3. \u6e1b\u5c11\u4e8b\u52d9\u7684\u7bc4\u570d<\/h3>\n<p>\u5c07\u4e8b\u52d9\u7684\u7bc4\u570d\u7e2e\u5c0f\u5230\u5fc5\u8981\u7684\u64cd\u4f5c\uff0c\u907f\u514d\u5728\u4e8b\u52d9\u4e2d\u57f7\u884c\u4e0d\u5fc5\u8981\u7684\u67e5\u8a62\u6216\u64cd\u4f5c\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u9396\u6301\u6709\u7684\u6642\u9593\uff0c\u964d\u4f4e\u9396\u7af6\u722d\u7684\u53ef\u80fd\u6027\u3002<\/p>\n<pre><code>START TRANSACTION;\nUPDATE accounts SET balance = balance - 100 WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e9%9d%9e%e9%8e%96%e5%ae%9a%e8%ae%80%e5%8f%96-TgHQvydAZz\">4. \u4f7f\u7528\u975e\u9396\u5b9a\u8b80\u53d6<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u975e\u9396\u5b9a\u8b80\u53d6\uff08\u5982READ UNCOMMITTED\u6216READ COMMITTED\uff09\u4f86\u6e1b\u5c11\u9396\u7af6\u722d\u3002\u9019\u6a23\u53ef\u4ee5\u5141\u8a31\u8b80\u53d6\u672a\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u4e26\u767c\u6027\u3002<\/p>\n<pre><code>SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;<\/code><\/pre>\n<h3 id=\"5-%e5%ae%9a%e6%9c%9f%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%aa%bf%e6%95%b4-TgHQvydAZz\">5. \u5b9a\u671f\u76e3\u63a7\u548c\u8abf\u6574<\/h3>\n<p>\u5b9a\u671f\u76e3\u63a7\u6578\u64da\u5eab\u7684\u6027\u80fd\u6307\u6a19\uff0c\u5982\u9396\u7b49\u5f85\u6642\u9593\u548c\u4e8b\u52d9\u6578\u91cf\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u8abf\u6574\u3002\u4f7f\u7528MySQL\u7684\u6027\u80fd\u6a21\u5f0f\uff08Performance Schema\uff09\u4f86\u7372\u53d6\u8a73\u7d30\u7684\u9396\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-TgHQvydAZz\">\u7d50\u8ad6<\/h2>\n<p>\u964d\u4f4e\u9396\u7af6\u722d\u662f\u63d0\u9ad8MySQL\u6027\u80fd\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002\u901a\u904e\u4f7f\u7528\u884c\u9396\u3001\u512a\u5316\u67e5\u8a62\u3001\u6e1b\u5c11\u4e8b\u52d9\u7bc4\u570d\u3001\u4f7f\u7528\u975e\u9396\u5b9a\u8b80\u53d6\u4ee5\u53ca\u5b9a\u671f\u76e3\u63a7\u548c\u8abf\u6574\uff0c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u7528\u6236\u7684\u7b49\u5f85\u6642\u9593\uff0c\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u97ff\u61c9\u901f\u5ea6\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u9019\u4e9b\u7b56\u7565\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u5982\u4f55\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u63a2\u7d22\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u9019\u4e9b\u89e3\u6c7a\u65b9\u6848\u5c08\u70ba\u6eff\u8db3\u9ad8\u6548\u80fd\u9700\u6c42\u800c\u8a2d\u8a08\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u964d\u4f4e\u9396\u7af6\u722d\u7684\u65b9\u6cd5\uff0c\u6e1b\u5c11MySQL\u7528\u6236\u7b49\u5f85\u6642\u9593\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u97ff\u61c9\u901f\u5ea6\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-162767","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162767","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=162767"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162767\/revisions"}],"predecessor-version":[{"id":162768,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162767\/revisions\/162768"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162767"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162767"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}