{"id":75552,"date":"2024-10-15T23:45:16","date_gmt":"2024-10-15T15:45:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75552\/"},"modified":"2024-10-15T23:45:16","modified_gmt":"2024-10-15T15:45:16","slug":"mysql-%e4%ba%8b%e4%bb%b6%e8%aa%bf%e5%ba%a6%e5%99%a8%e7%a4%ba%e4%be%8b%e6%bc%94%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75552\/","title":{"rendered":"MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\u793a\u4f8b\u6f14\u793a"},"content":{"rendered":"<h1 id=\"mysql-%e4%ba%8b%e4%bb%b6%e8%aa%bf%e5%ba%a6%e5%99%a8%e7%a4%ba%e4%be%8b%e6%bc%94%e7%a4%ba-PIXkDZgeuE\">MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\u793a\u4f8b\u6f14\u793a<\/h1>\n<p>MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\u662f\u4e00\u500b\u5f37\u5927\u7684\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u5728\u7279\u5b9a\u7684\u6642\u9593\u9593\u9694\u6216\u7279\u5b9a\u7684\u6642\u9593\u9ede\u81ea\u52d5\u57f7\u884c SQL \u8a9e\u53e5\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5b9a\u671f\u57f7\u884c\u7684\u4efb\u52d9\uff0c\u5982\u6578\u64da\u5099\u4efd\u3001\u5831\u544a\u751f\u6210\u6216\u6578\u64da\u6e05\u7406\u7b49\uff0c\u7279\u5225\u6709\u7528\u3002\u672c\u6587\u5c07\u4ecb\u7d39 MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5982\u4f55\u5275\u5efa\u4e8b\u4ef6\u4ee5\u53ca\u4e00\u4e9b\u5be6\u969b\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-mysql-%e4%ba%8b%e4%bb%b6%e8%aa%bf%e5%ba%a6%e5%99%a8%ef%bc%9f-PIXkDZgeuE\">\u4ec0\u9ebc\u662f MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\uff1f<\/h2>\n<p>MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\u662f\u4e00\u500b\u5167\u5efa\u7684\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u548c\u7ba1\u7406\u5b9a\u6642\u4efb\u52d9\u3002\u9019\u4e9b\u4efb\u52d9\u53ef\u4ee5\u662f\u4efb\u4f55\u6709\u6548\u7684 SQL \u8a9e\u53e5\uff0c\u5305\u62ec\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u3002\u4e8b\u4ef6\u8abf\u5ea6\u5668\u7684\u5de5\u4f5c\u539f\u7406\u985e\u4f3c\u65bc\u64cd\u4f5c\u7cfb\u7d71\u4e2d\u7684\u8a08\u5283\u4efb\u52d9\uff0c\u80fd\u5920\u5728\u6307\u5b9a\u7684\u6642\u9593\u81ea\u52d5\u57f7\u884c\u3002<\/p>\n<h2 id=\"%e5%95%9f%e7%94%a8%e4%ba%8b%e4%bb%b6%e8%aa%bf%e5%ba%a6%e5%99%a8-PIXkDZgeuE\">\u555f\u7528\u4e8b\u4ef6\u8abf\u5ea6\u5668<\/h2>\n<p>\u5728\u4f7f\u7528\u4e8b\u4ef6\u8abf\u5ea6\u5668\u4e4b\u524d\uff0c\u5fc5\u9808\u78ba\u4fdd\u5b83\u5df2\u88ab\u555f\u7528\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u6aa2\u67e5\u548c\u555f\u7528\u4e8b\u4ef6\u8abf\u5ea6\u5668\uff1a<\/p>\n<pre><code>SHOW VARIABLES LIKE 'event_scheduler';\nSET GLOBAL event_scheduler = ON;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c\u4e8b\u4ef6\u8abf\u5ea6\u5668\u5c07\u88ab\u555f\u7528\uff0c\u4e26\u53ef\u4ee5\u958b\u59cb\u5275\u5efa\u4e8b\u4ef6\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e4%ba%8b%e4%bb%b6%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-PIXkDZgeuE\">\u5275\u5efa\u4e8b\u4ef6\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5275\u5efa\u4e8b\u4ef6\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE EVENT event_name\nON SCHEDULE schedule\nDO sql_statement;<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>event_name<\/code> \u662f\u4e8b\u4ef6\u7684\u540d\u7a31\uff0c<code>schedule<\/code> \u5b9a\u7fa9\u4e86\u4e8b\u4ef6\u7684\u57f7\u884c\u6642\u9593\uff0c\u800c <code>sql_statement<\/code> \u662f\u8981\u57f7\u884c\u7684 SQL \u8a9e\u53e5\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e6%af%8f%e5%b0%8f%e6%99%82%e5%9f%b7%e8%a1%8c%e4%b8%80%e6%ac%a1%e7%9a%84%e4%ba%8b%e4%bb%b6-PIXkDZgeuE\">\u793a\u4f8b\uff1a\u6bcf\u5c0f\u6642\u57f7\u884c\u4e00\u6b21\u7684\u4e8b\u4ef6<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u8a72\u4e8b\u4ef6\u6bcf\u5c0f\u6642\u57f7\u884c\u4e00\u6b21\uff0c\u4e26\u5c07\u7576\u524d\u6642\u9593\u63d2\u5165\u5230\u4e00\u500b\u540d\u70ba <code>event_log<\/code> \u7684\u8868\u4e2d\uff1a<\/p>\n<pre><code>CREATE EVENT log_event\nON SCHEDULE EVERY 1 HOUR\nDO\nINSERT INTO event_log (event_time) VALUES (NOW());<\/code><\/pre>\n<p>\u9019\u500b\u4e8b\u4ef6\u5c07\u6bcf\u5c0f\u6642\u81ea\u52d5\u57f7\u884c\uff0c\u4e26\u5728 <code>event_log<\/code> \u8868\u4e2d\u8a18\u9304\u7576\u524d\u6642\u9593\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e7%89%b9%e5%ae%9a%e6%99%82%e9%96%93%e5%9f%b7%e8%a1%8c%e7%9a%84%e4%ba%8b%e4%bb%b6-PIXkDZgeuE\">\u793a\u4f8b\uff1a\u7279\u5b9a\u6642\u9593\u57f7\u884c\u7684\u4e8b\u4ef6<\/h2>\n<p>\u9664\u4e86\u5b9a\u671f\u57f7\u884c\u7684\u4e8b\u4ef6\uff0c\u9084\u53ef\u4ee5\u5275\u5efa\u5728\u7279\u5b9a\u6642\u9593\u57f7\u884c\u7684\u4e8b\u4ef6\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4e8b\u4ef6\u5c07\u5728\u6bcf\u500b\u661f\u671f\u4e00\u7684\u51cc\u6668 1 \u9ede\u57f7\u884c\uff1a<\/p>\n<pre><code>CREATE EVENT weekly_cleanup\nON SCHEDULE AT '2023-10-02 01:00:00'\nDO\nDELETE FROM old_data WHERE created_at &lt; NOW() - INTERVAL 30 DAY;<\/code><\/pre>\n<p>\u9019\u500b\u4e8b\u4ef6\u5c07\u522a\u9664 <code>old_data<\/code> \u8868\u4e2d\u6240\u6709\u5275\u5efa\u6642\u9593\u8d85\u904e 30 \u5929\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e7%9c%8b%e5%92%8c%e7%ae%a1%e7%90%86%e4%ba%8b%e4%bb%b6-PIXkDZgeuE\">\u67e5\u770b\u548c\u7ba1\u7406\u4e8b\u4ef6<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u5df2\u5275\u5efa\u7684\u4e8b\u4ef6\uff1a<\/p>\n<pre><code>SHOW EVENTS;<\/code><\/pre>\n<p>\u5982\u679c\u9700\u8981\u4fee\u6539\u6216\u522a\u9664\u4e8b\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>ALTER EVENT event_name ...;\nDROP EVENT event_name;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PIXkDZgeuE\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u4e8b\u4ef6\u8abf\u5ea6\u5668\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u81ea\u52d5\u5316\u65e5\u5e38\u4efb\u52d9\u3002\u901a\u904e\u7c21\u55ae\u7684 SQL \u8a9e\u53e5\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5275\u5efa\u548c\u7ba1\u7406\u4e8b\u4ef6\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002\u7121\u8ad6\u662f\u5b9a\u671f\u5099\u4efd\u6578\u64da\u9084\u662f\u6e05\u7406\u904e\u671f\u6578\u64da\uff0c\u4e8b\u4ef6\u8abf\u5ea6\u5668\u90fd\u80fd\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684 MySQL \u6578\u64da\u5eab\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u4e8b\u4ef6\u8abf\u5ea6\u5668\u7684\u793a\u4f8b\u6f14\u793a\uff0c\u5b78\u7fd2\u5982\u4f55\u81ea\u52d5\u5316\u4efb\u52d9\u548c\u7ba1\u7406\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u63d0\u9ad8\u6548\u7387\u8207\u6027\u80fd\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-75552","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75552","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=75552"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75552\/revisions"}],"predecessor-version":[{"id":75553,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75552\/revisions\/75553"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}