{"id":5212,"date":"2024-11-14T10:58:12","date_gmt":"2024-11-14T02:58:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5212\/"},"modified":"2024-11-14T10:58:12","modified_gmt":"2024-11-14T02:58:12","slug":"sql%e8%b0%83%e8%af%95%e6%80%8e%e4%b9%88%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5212\/","title":{"rendered":"sql\u8c03\u8bd5\u600e\u4e48\u7528"},"content":{"rendered":"<blockquote><p>\n  sql \u8c03\u8bd5\u662f\u8bc6\u522b\u548c\u89e3\u51b3 sql \u67e5\u8be2\u4e2d\u9519\u8bef\u548c\u6027\u80fd\u95ee\u9898\u7684\u8fc7\u7a0b\u3002\u5177\u4f53\u6280\u672f\u5305\u62ec\uff1a\u6253\u5370\u67e5\u8be2\u8bed\u53e5\uff08\u5982\u4f7f\u7528 explain\uff09\u4ee5\u67e5\u770b\u6267\u884c\u8ba1\u5212\u3002\u5206\u6b65\u6267\u884c\u590d\u6742\u67e5\u8be2\u3002\u4f7f\u7528\u8c03\u8bd5\u5668\u9010\u884c\u68c0\u67e5\u6267\u884c\u3002\u67e5\u770b\u6267\u884c\u7edf\u8ba1\u4fe1\u606f\uff08\u5982\u4f7f\u7528 show profile\uff09\u4ee5\u8bc6\u522b\u6027\u80fd\u95ee\u9898\u3002\u68c0\u67e5\u8be6\u7ec6\u7684\u9519\u8bef\u6d88\u606f\u3002\u4f7f\u7528\u65e5\u5fd7\u8bb0\u5f55\u6355\u83b7\u67e5\u8be2\u6267\u884c\u8bb0\u5f55\u3002\u5bfb\u6c42\u5916\u90e8\u5e2e\u52a9\u3002sql \u8c03\u8bd5\u6709\u52a9\u4e8e\u8bc6\u522b\u9519\u8bef\u3001\u4f18\u5316\u6027\u80fd\u3001\u7b80\u5316\u7ef4\u62a4\u548c\u6545\u969c\u6392\u9664\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/24\/2024052421091835525.jpg\" class=\"aligncenter\" title=\"sql\u8c03\u8bd5\u600e\u4e48\u7528\u63d2\u56fe\" alt=\"sql\u8c03\u8bd5\u600e\u4e48\u7528\u63d2\u56fe\" \/><\/p>\n<p><strong>SQL \u8c03\u8bd5\uff1a\u6280\u5de7\u548c\u65b9\u6cd5<\/strong><\/p>\n<p><strong>\u4ec0\u4e48\u662f SQL \u8c03\u8bd5\uff1f<\/strong><\/p>\n<p>SQL \u8c03\u8bd5\u662f\u6307\u8bc6\u522b\u548c\u89e3\u51b3 SQL \u67e5\u8be2\u4e2d\u9519\u8bef\u548c\u6027\u80fd\u95ee\u9898\u3002\u5b83\u6d89\u53ca\u68c0\u67e5\u67e5\u8be2\u7684\u903b\u8f91\u3001\u7ed3\u6784\u548c\u6027\u80fd\uff0c\u5e76\u91c7\u53d6\u63aa\u65bd\u6539\u8fdb\u67e5\u8be2\u3002<\/p>\n<p><strong>SQL \u8c03\u8bd5\u6280\u672f<\/strong><\/p>\n<p><strong>1. \u6253\u5370\u67e5\u8be2\u8bed\u53e5\uff1a<\/strong><\/p>\n<p>\u4f7f\u7528 EXPLAIN \u6216 SHOWPLAN \u7b49\u547d\u4ee4\u67e5\u770b SQL \u670d\u52a1\u5668\u5982\u4f55\u89e3\u6790\u548c\u6267\u884c\u67e5\u8be2\u3002\u8fd9\u63ed\u793a\u4e86\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u53ef\u7528\u4e8e\u8bc6\u522b\u7d22\u5f15\u4f7f\u7528\u548c\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<p><strong>2. \u5206\u6b65\u6267\u884c\u67e5\u8be2\uff1a<\/strong><\/p>\n<p>\u5c06\u590d\u6742\u67e5\u8be2\u5206\u89e3\u4e3a\u8f83\u5c0f\u7684\u90e8\u5206\uff0c\u5e76\u9010\u4e2a\u90e8\u5206\u6267\u884c\u3002\u8fd9\u6709\u52a9\u4e8e\u9694\u79bb\u9519\u8bef\u5e76\u7f29\u5c0f\u95ee\u9898\u8303\u56f4\u3002<\/p>\n<p><strong>3. \u4f7f\u7528\u8c03\u8bd5\u5668\uff1a<\/strong><\/p>\n<p>\u67d0\u4e9b DBMS \u63d0\u4f9b\u8c03\u8bd5\u5668\uff0c\u5141\u8bb8\u7528\u6237\u9010\u884c\u68c0\u67e5\u67e5\u8be2\u7684\u6267\u884c\u3002\u8fd9\u5bf9\u4e8e\u8bca\u65ad\u903b\u8f91\u9519\u8bef\u548c\u4f18\u5316\u67e5\u8be2\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p><strong>4. \u67e5\u770b\u6267\u884c\u7edf\u8ba1\u4fe1\u606f\uff1a<\/strong><\/p>\n<p>\u4f7f\u7528 SHOW PROFILE \u6216 EXPLAIN ANALYZE \u4e4b\u7c7b\u7684\u547d\u4ee4\u83b7\u53d6\u67e5\u8be2\u7684\u6267\u884c\u7edf\u8ba1\u4fe1\u606f\u3002\u8fd9\u4e9b\u7edf\u8ba1\u4fe1\u606f\u663e\u793a\u67e5\u8be2\u7684\u6301\u7eed\u65f6\u95f4\u3001\u8bfb\u53d6\u7684\u884c\u6570\u4ee5\u53ca\u5176\u4ed6\u6027\u80fd\u6307\u6807\uff0c\u6709\u52a9\u4e8e\u8bc6\u522b\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<p><strong>5. \u68c0\u67e5\u9519\u8bef\u6d88\u606f\uff1a<\/strong><\/p>\n<p>SQL \u670d\u52a1\u5668\u901a\u5e38\u4f1a\u751f\u6210\u8be6\u7ec6\u7684\u9519\u8bef\u6d88\u606f\uff0c\u6307\u51fa\u67e5\u8be2\u9519\u8bef\u3002\u4ed4\u7ec6\u5206\u6790\u8fd9\u4e9b\u6d88\u606f\u53ef\u63d0\u4f9b\u6709\u5173\u9519\u8bef\u539f\u56e0\u7684\u91cd\u8981\u7ebf\u7d22\u3002<\/p>\n<p><strong>6. \u4f7f\u7528\u65e5\u5fd7\u8bb0\u5f55\uff1a<\/strong><\/p>\n<p>\u542f\u7528\u67e5\u8be2\u65e5\u5fd7\u8bb0\u5f55\u53ef\u4ee5\u6355\u83b7\u67e5\u8be2\u6267\u884c\u7684\u8be6\u7ec6\u8bb0\u5f55\u3002\u8fd9\u5bf9\u4e8e\u8bca\u65ad\u95f4\u6b47\u6027\u9519\u8bef\u6216\u6027\u80fd\u6ce2\u52a8\u95ee\u9898\u5f88\u6709\u7528\u3002<\/p>\n<p><strong>7. \u5bfb\u6c42\u5916\u90e8\u5e2e\u52a9\uff1a<\/strong><\/p>\n<p>\u5982\u679c\u5185\u90e8\u8c03\u8bd5\u5c1d\u8bd5\u5931\u8d25\uff0c\u53ef\u4ee5\u8003\u8651\u5bfb\u6c42\u793e\u533a\u8bba\u575b\u6216\u6570\u636e\u5e93\u4e13\u5bb6\u7b49\u5916\u90e8\u5e2e\u52a9\u3002<\/p>\n<p><strong>\u4f7f\u7528 SQL \u8c03\u8bd5\u7684\u4f18\u52bf<\/strong><\/p>\n<ul>\n<li>\u8bc6\u522b\u548c\u89e3\u51b3\u67e5\u8be2\u9519\u8bef<\/li>\n<li>\u4f18\u5316\u67e5\u8be2\u6027\u80fd<\/li>\n<li>\u63d0\u9ad8\u6570\u636e\u5e93\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd<\/li>\n<li>\u7b80\u5316\u7ef4\u62a4\u548c\u6545\u969c\u6392\u9664<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fsql\u8c03\u8bd5\u600e\u4e48\u7528\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sql \u8c03\u8bd5\u662f\u8bc6\u522b\u548c\u89e3\u51b3 sql \u67e5\u8be2\u4e2d\u9519\u8bef\u548c\u6027\u80fd\u95ee\u9898\u7684\u8fc7\u7a0b\u3002\u5177\u4f53\u6280\u672f\u5305\u62ec\uff1a\u6253\u5370\u67e5\u8be2\u8bed\u53e5\uff08\u5982\u4f7f\u7528 explain\uff09\u4ee5\u67e5\u770b\u6267\u884c\u8ba1\u5212\u3002\u5206\u6b65\u6267\u884c\u590d\u6742\u67e5\u8be2\u3002\u4f7f\u7528\u8c03\u8bd5\u5668\u9010\u884c\u68c0\u67e5\u6267\u884c\u3002\u67e5\u770b\u6267\u884c\u7edf\u8ba1\u4fe1\u606f\uff08\u5982\u4f7f\u7528 show profile\uff09\u4ee5\u8bc6\u522b\u6027\u80fd\u95ee\u9898\u3002\u68c0\u67e5\u8be6\u7ec6\u7684\u9519\u8bef\u6d88\u606f\u3002\u4f7f\u7528\u65e5\u5fd7\u8bb0\u5f55\u6355\u83b7\u67e5\u8be2\u6267\u884c\u8bb0\u5f55\u3002\u5bfb\u6c42\u5916\u90e8\u5e2e\u52a9\u3002sql \u8c03\u8bd5\u6709\u52a9\u4e8e\u8bc6\u522b\u9519\u8bef\u3001\u4f18\u5316\u6027\u80fd\u3001\u7b80\u5316\u7ef4\u62a4\u548c\u6545\u969c\u6392\u9664\u3002 SQL \u8c03\u8bd5\uff1a\u6280\u5de7\u548c\u65b9\u6cd5 \u4ec0\u4e48\u662f SQL \u8c03\u8bd5\uff1f SQL \u8c03\u8bd5\u662f\u6307\u8bc6\u522b\u548c\u89e3\u51b3 SQL \u67e5\u8be2\u4e2d\u9519\u8bef\u548c\u6027\u80fd\u95ee\u9898\u3002\u5b83\u6d89\u53ca\u68c0\u67e5\u67e5\u8be2\u7684\u903b\u8f91\u3001\u7ed3\u6784\u548c\u6027\u80fd\uff0c\u5e76\u91c7\u53d6\u63aa\u65bd\u6539\u8fdb\u67e5\u8be2\u3002 SQL \u8c03\u8bd5\u6280\u672f 1. \u6253\u5370\u67e5\u8be2\u8bed\u53e5\uff1a \u4f7f\u7528 EXPLAIN \u6216 SHOWPLAN \u7b49\u547d\u4ee4\u67e5\u770b SQL \u670d\u52a1\u5668\u5982\u4f55\u89e3\u6790\u548c\u6267\u884c\u67e5\u8be2\u3002\u8fd9\u63ed\u793a\u4e86\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u53ef\u7528\u4e8e\u8bc6\u522b\u7d22\u5f15\u4f7f\u7528\u548c\u6027\u80fd\u74f6\u9888\u3002 2. \u5206\u6b65\u6267\u884c\u67e5\u8be2\uff1a \u5c06\u590d\u6742\u67e5\u8be2\u5206\u89e3\u4e3a\u8f83\u5c0f\u7684\u90e8\u5206\uff0c\u5e76\u9010\u4e2a\u90e8\u5206\u6267\u884c\u3002\u8fd9\u6709\u52a9\u4e8e\u9694\u79bb\u9519\u8bef\u5e76\u7f29\u5c0f\u95ee\u9898\u8303\u56f4\u3002 3. \u4f7f\u7528\u8c03\u8bd5\u5668\uff1a \u67d0\u4e9b DBMS \u63d0\u4f9b\u8c03\u8bd5\u5668\uff0c\u5141\u8bb8\u7528\u6237\u9010\u884c\u68c0\u67e5\u67e5\u8be2\u7684\u6267\u884c\u3002\u8fd9\u5bf9\u4e8e\u8bca\u65ad\u903b\u8f91\u9519\u8bef\u548c\u4f18\u5316\u67e5\u8be2\u975e\u5e38\u6709\u7528\u3002 4. \u67e5\u770b\u6267\u884c\u7edf\u8ba1\u4fe1\u606f\uff1a \u4f7f\u7528 SHOW PROFILE \u6216 EXPLAIN ANALYZE \u4e4b\u7c7b\u7684\u547d\u4ee4\u83b7\u53d6\u67e5\u8be2\u7684\u6267\u884c\u7edf\u8ba1\u4fe1\u606f\u3002\u8fd9\u4e9b\u7edf\u8ba1\u4fe1\u606f\u663e\u793a\u67e5\u8be2\u7684\u6301\u7eed\u65f6\u95f4\u3001\u8bfb\u53d6\u7684\u884c\u6570\u4ee5\u53ca\u5176\u4ed6\u6027\u80fd\u6307\u6807\uff0c\u6709\u52a9\u4e8e\u8bc6\u522b\u6027\u80fd\u95ee\u9898\u3002 5. \u68c0\u67e5\u9519\u8bef\u6d88\u606f\uff1a SQL \u670d\u52a1\u5668\u901a\u5e38\u4f1a\u751f\u6210\u8be6\u7ec6\u7684\u9519\u8bef\u6d88\u606f\uff0c\u6307\u51fa\u67e5\u8be2\u9519\u8bef\u3002\u4ed4\u7ec6\u5206\u6790\u8fd9\u4e9b\u6d88\u606f\u53ef\u63d0\u4f9b\u6709\u5173\u9519\u8bef\u539f\u56e0\u7684\u91cd\u8981\u7ebf\u7d22\u3002 6. \u4f7f\u7528\u65e5\u5fd7\u8bb0\u5f55\uff1a \u542f\u7528\u67e5\u8be2\u65e5\u5fd7\u8bb0\u5f55\u53ef\u4ee5\u6355\u83b7\u67e5\u8be2\u6267\u884c\u7684\u8be6\u7ec6\u8bb0\u5f55\u3002\u8fd9\u5bf9\u4e8e\u8bca\u65ad\u95f4\u6b47\u6027\u9519\u8bef\u6216\u6027\u80fd\u6ce2\u52a8\u95ee\u9898\u5f88\u6709\u7528\u3002 7. \u5bfb\u6c42\u5916\u90e8\u5e2e\u52a9\uff1a \u5982\u679c\u5185\u90e8\u8c03\u8bd5\u5c1d\u8bd5\u5931\u8d25\uff0c\u53ef\u4ee5\u8003\u8651\u5bfb\u6c42\u793e\u533a\u8bba\u575b\u6216\u6570\u636e\u5e93\u4e13\u5bb6\u7b49\u5916\u90e8\u5e2e\u52a9\u3002 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5212","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5212","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5212"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5212\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}