{"id":5415,"date":"2024-08-08T11:40:15","date_gmt":"2024-08-08T03:40:15","guid":{"rendered":"https:\/\/www.xttblog.com\/?p=5415"},"modified":"2024-08-08T11:40:15","modified_gmt":"2024-08-08T03:40:15","slug":"58%e5%90%8c%e5%9f%8e%e7%9a%84-mysql-%e8%ae%be%e8%ae%a1%e4%b8%8e%e4%bd%bf%e7%94%a8%e5%86%9b%e8%a7%84","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=5415","title":{"rendered":"58\u540c\u57ce\u7684 mysql \u8bbe\u8ba1\u4e0e\u4f7f\u7528\u519b\u89c4"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001\u57fa\u7840\u89c4\u8303<\/strong><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e00\u6761\uff1a\u5fc5\u987b\u4f7f\u7528InnoDB\u5b58\u50a8\u5f15\u64ce<\/p><\/blockquote>\n\n\n\n<p 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class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e8c\u6761\uff1a\u5fc5\u987b\u628a\u5b57\u6bb5\u5b9a\u4e49\u4e3aNOT&nbsp;NULL\u5e76\u4e14\u63d0\u4f9b\u9ed8\u8ba4\u503c<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a<\/p>\n\n\n\n<ul 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is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e03\u6761\uff1a\u8868\u5fc5\u987b\u6709\u4e3b\u952e\uff0c\u4f8b\u5982\u81ea\u589e\u4e3b\u952e<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4e3b\u952e\u9012\u589e\uff0c\u6570\u636e\u884c\u5199\u5165\u53ef\u4ee5\u63d0\u9ad8\u63d2\u5165\u6027\u80fd\uff0c\u53ef\u4ee5\u907f\u514dpage\u5206\u88c2\uff0c\u51cf\u5c11\u8868\u788e\u7247\u63d0\u5347\u7a7a\u95f4\u548c\u5185\u5b58\u7684\u4f7f\u7528<\/li><li>\u4e3b\u952e\u8981\u9009\u62e9\u8f83\u77ed\u7684\u6570\u636e\u7c7b\u578b\uff0c&nbsp;Innodb\u5f15\u64ce\u666e\u901a\u7d22\u5f15\u90fd\u4f1a\u4fdd\u5b58\u4e3b\u952e\u7684\u503c\uff0c\u8f83\u77ed\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u6709\u6548\u7684\u51cf\u5c11\u7d22\u5f15\u7684\u78c1\u76d8\u7a7a\u95f4\uff0c\u63d0\u9ad8\u7d22\u5f15\u7684\u7f13\u5b58\u6548\u7387<\/li><li>\u65e0\u4e3b\u952e\u7684\u8868\u5220\u9664\uff0c\u5728row\u6a21\u5f0f\u7684\u4e3b\u4ece\u67b6\u6784\uff0c\u4f1a\u5bfc\u81f4\u5907\u5e93\u592f\u4f4f<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u56db\u3001\u7d22\u5f15\u8bbe\u8ba1\u89c4\u8303<\/strong><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e00\u6761\uff1a\u5355\u8868\u7d22\u5f15\u5efa\u8bae\u63a7\u5236\u57285\u4e2a\u4ee5\u5185<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a\u4e00\u4e2a\u597d\u7684\u7d22\u5f15\u8bbe\u8ba1\uff0c\u53ef\u4ee5\u8ba9\u4f60\u7684\u6548\u7387\u63d0\u9ad8\u51e0\u5341\u751a\u81f3\u51e0\u767e\u500d\uff0c\u4f46\u8fc7\u591a\u53cd\u800c\u9002\u5f97\u5176\u53cd<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e8c\u6761\uff1a\u5355\u7d22\u5f15\u5b57\u6bb5\u6570\u4e0d\u5141\u8bb8\u8d85\u8fc75\u4e2a<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a\u5b57\u6bb5\u8d85\u8fc75\u4e2a\u65f6\uff0c\u5b9e\u9645\u5df2\u7ecf\u8d77\u4e0d\u5230\u6709\u6548\u8fc7\u6ee4\u6570\u636e\u7684\u4f5c\u7528\u4e86<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e09\u6761\uff1a\u7981\u6b62\u5728\u66f4\u65b0\u5341\u5206\u9891\u7e41\u3001\u533a\u5206\u5ea6\u4e0d\u9ad8\u7684\u5c5e\u6027\u4e0a\u5efa\u7acb\u7d22\u5f15<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u66f4\u65b0\u4f1a\u53d8\u66f4B+\u6811\uff0c\u66f4\u65b0\u9891\u7e41\u7684\u5b57\u6bb5\u5efa\u7acb\u7d22\u5f15\u4f1a\u5927\u5927\u964d\u4f4e\u6570\u636e\u5e93\u6027\u80fd<\/li><li>&#8220;\u6027\u522b&#8221;\u8fd9\u79cd\u533a\u5206\u5ea6\u4e0d\u5927\u7684\u5c5e\u6027\uff0c\u5efa\u7acb\u7d22\u5f15\u662f\u6ca1\u6709\u4ec0\u4e48\u610f\u4e49\u7684\uff0c\u4e0d\u80fd\u6709\u6548\u8fc7\u6ee4\u6570\u636e\uff0c\u6027\u80fd\u4e0e\u5168\u8868\u626b\u63cf\u7c7b\u4f3c<\/li><\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u56db\u6761:\u5efa\u7acb\u7ec4\u5408\u7d22\u5f15\uff0c\u5fc5\u987b\u628a\u533a\u5206\u5ea6\u9ad8\u7684\u5b57\u6bb5\u653e\u5728\u524d\u9762<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a\u80fd\u591f\u66f4\u52a0\u6709\u6548\u7684\u8fc7\u6ee4\u6570\u636e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e94\u3001SQL\u4f7f\u7528\u89c4\u8303<\/strong><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e00\u6761\uff1a\u7981\u6b62\u4f7f\u7528SELECT&nbsp;*\uff0c\u53ea\u83b7\u53d6\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u9700\u8981\u663e\u793a\u8bf4\u660e\u5217\u5c5e\u6027<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u8bfb\u53d6\u4e0d\u9700\u8981\u7684\u5217\u4f1a\u589e\u52a0CPU\u3001IO\u3001NET\u6d88\u8017<\/li><li>\u4e0d\u80fd\u6709\u6548\u7684\u5229\u7528\u8986\u76d6\u7d22\u5f15<\/li><li>\u4f7f\u7528<code>SELECT&nbsp;*<\/code>\u5bb9\u6613\u5728\u589e\u52a0\u6216\u8005\u5220\u9664\u5b57\u6bb5\u540e\u51fa\u73b0\u7a0b\u5e8fBUG<\/li><\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e8c\u6761\uff1a\u7981\u6b62\u4f7f\u7528<code>INSERT&nbsp;INTO&nbsp;t_xxx&nbsp;VALUES\\(xxx\\)<\/code>\uff0c\u5fc5\u987b\u663e\u793a\u6307\u5b9a\u63d2\u5165\u7684\u5217\u5c5e\u6027<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a\u5bb9\u6613\u5728\u589e\u52a0\u6216\u8005\u5220\u9664\u5b57\u6bb5\u540e\u51fa\u73b0\u7a0b\u5e8fBUG<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e09\u6761\uff1a\u7981\u6b62\u4f7f\u7528\u5c5e\u6027\u9690\u5f0f\u8f6c\u6362<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a<code>SELECT&nbsp;uid&nbsp;FROM&nbsp;t_user&nbsp;WHERE&nbsp;phone=13812345678<\/code>&nbsp;\u4f1a\u5bfc\u81f4\u5168\u8868\u626b\u63cf\uff0c\u800c\u4e0d\u80fd\u547d\u4e2dphone\u7d22\u5f15\uff0c\u731c\u731c\u4e3a\u4ec0\u4e48\uff1fint\u6570\u636e\u7c7b\u578b\u4f18\u5148\u7ea7\u9ad8\u4e8earcher\uff0c&nbsp;\u8be5\u67e5\u8be2\u4f1a\u628aphone\u8f6c\u6362\u4e3aint\uff0c\u56e0\u6b64\u9700\u8981\u628a\u8868\u4e2d\u6240\u6709\u6570\u636e\u6539\u6210int\uff0c\u6240\u4ee5\u5fc5\u987b\u5168\u76d8\u626b\u63cf phone\u662fvarchar\u7c7b\u578b\uff0cSQL\u8bed\u53e5\u5e26\u5165\u7684\u662f\u6574\u5f62\uff0c\u6545\u4e0d\u4f1a\u547d\u4e2d\u7d22\u5f15\uff0c\u52a0\u4e2a\u5f15\u53f7\u5c31\u597d\u4e86\uff1a<code>SELECT&nbsp;uid&nbsp;FROM&nbsp;t_user&nbsp;WHERE&nbsp;phone='13812345678'<\/code>\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u56db\u6761\uff1a\u7981\u6b62\u5728WHERE\u6761\u4ef6\u7684\u5c5e\u6027\u4e0a\u4f7f\u7528\u51fd\u6570\u6216\u8005\u8868\u8fbe\u5f0f<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1aSELECT&nbsp;uid&nbsp;FROM&nbsp;t_user&nbsp;WHERE&nbsp;from_unixtime(day)&gt;=&#8217;2017-02-15&#8242;&nbsp;\u4f1a\u5bfc\u81f4\u5168\u8868\u626b\u63cf \u6b63\u786e\u7684\u5199\u6cd5\u662f\uff1aSELECT&nbsp;uid&nbsp;FROM&nbsp;t_user&nbsp;WHERE&nbsp;day&gt;=&nbsp;unix_timestamp(&#8216;2017-02-15&nbsp;00:00:00&#8217;)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e94\u6761\uff1a\u7981\u6b62\u5927\u8868\u4f7f\u7528JOIN\u67e5\u8be2\uff0c\u7981\u6b62\u5927\u8868\u4f7f\u7528\u5b50\u67e5\u8be2<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a\u4f1a\u4ea7\u751f\u4e34\u65f6\u8868\uff0c\u6d88\u8017\u8f83\u591a\u5185\u5b58\u4e0eCPU\uff0c\u6781\u5927\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\uff0c\u5927\u8868\u6307\u7684\u662f\u6570\u636e\u91cf\u57281000\u4e07\u4ee5\u4e0a\u7684\u8868<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u516d\u6761\uff1a\u7981\u6b62\u4f7f\u7528OR\u6761\u4ef6\uff0c\u5fc5\u987b\u6539\u4e3aIN\u67e5\u8be2<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1a\u65e7\u7248\u672cMysql\u7684OR\u67e5\u8be2\u662f\u4e0d\u80fd\u547d\u4e2d\u7d22\u5f15\u7684\uff0c\u5373\u4f7f\u80fd\u547d\u4e2d\u7d22\u5f15\uff0c\u4e3a\u4f55\u8981\u8ba9\u6570\u636e\u5e93\u8017\u8d39\u66f4\u591a\u7684CPU\u5e2e\u52a9\u5b9e\u65bd\u67e5\u8be2\u4f18\u5316\u5462\uff1f<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u4e03\u6761\uff1a\u7981\u6b62\u4f7f\u7528\u8d1f\u5411\u67e5\u8be2\uff0c\u4ee5\u53ca%\u5f00\u5934\u7684\u6a21\u7cca\u67e5\u8be2<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8bfb\uff1aa)&nbsp;\u8d1f\u5411\u67e5\u8be2\u6761\u4ef6\uff1aNOT\u3001!=\u3001&lt;&gt;\u3001!&lt;\u3001!&gt;\u3001NOT&nbsp;IN\u3001NOT&nbsp;LIKE\u7b49\uff0c\u4f1a\u5bfc\u81f4\u5168\u8868\u626b\u63cf b)&nbsp;%\u5f00\u5934\u7684\u6a21\u7cca\u67e5\u8be2\uff0c\u4f1a\u5bfc\u81f4\u5168\u8868\u626b\u63cf \u4e00\u822c\u6765\u8bf4\uff0cWHERE\u8fc7\u6ee4\u6761\u4ef6\u4e0d\u4f1a\u53ea\u5e26\u8fd9\u4e48\u4e00\u4e2a\u201c\u8d1f\u5411\u67e5\u8be2\u6761\u4ef6\u201d\uff0c\u8fd8\u4f1a\u6709\u5176\u4ed6\u8fc7\u6ee4\u6761\u4ef6\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u67e5\u8be2\u6c88\u5251\u5df2\u5b8c\u6210\u8ba2\u5355\u4e4b\u5916\u7684\u8ba2\u5355\uff08\u597d\u62d7\u53e3\uff09\uff1a<code>SELECT&nbsp;oid&nbsp;FROM&nbsp;t_order&nbsp;WHERE&nbsp;uid=123&nbsp;AND&nbsp;status&nbsp;!=&nbsp;1;<\/code> \u8ba2\u5355\u88685000w\u6570\u636e\uff0c\u4f46uid=123\u5c31\u4f1a\u8fc5\u901f\u7684\u5c06\u6570\u636e\u91cf\u8fc7\u6ee4\u5230\u5f88\u5c11\u7684\u7ea7\u522b\uff08uid\u5efa\u7acb\u4e86\u7d22\u5f15\uff09\uff0c\u6b64\u65f6\u518d\u63a5\u4e0a\u4e00\u4e2a\u8d1f\u5411\u7684\u67e5\u8be2\u6761\u4ef6\u5c31\u65e0\u6240\u8c13\u4e86\uff0c\u626b\u63cf\u7684\u884c\u6570\u672c\u8eab\u5c31\u4f1a\u5f88\u5c11 \u4f46\u5982\u679c\u8981\u67e5\u8be2\u6240\u6709\u5df2\u5b8c\u6210\u8ba2\u5355\u4e4b\u5916\u7684\u8ba2\u5355\uff1a<code>SELECT&nbsp;oid&nbsp;FROM&nbsp;t_order&nbsp;WHERE&nbsp;status&nbsp;!=&nbsp;1;<\/code> \u8fd9\u5c31\u6302\u4e86\uff0c\u7acb\u9a6c<code>CPU100%<\/code>\uff0cstatus\u7d22\u5f15\u4f1a\u5931\u6548\uff0c\u8d1f\u5411\u67e5\u8be2\u5bfc\u81f4\u5168\u8868\u626b\u63cf<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><\/p><p>\u7b2c\u516b\u6761\uff1a\u5e94\u7528\u7a0b\u5e8f\u5fc5\u987b\u6355\u83b7SQL\u5f02\u5e38\uff0c\u5e76\u6709\u76f8\u5e94\u5904\u7406<\/p><\/blockquote>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font 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