{"id":7969,"date":"2024-11-14T16:35:31","date_gmt":"2024-11-14T08:35:31","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7969\/"},"modified":"2024-11-14T16:35:31","modified_gmt":"2024-11-14T08:35:31","slug":"%e4%bd%bf%e7%94%a8%e4%ba%8c%e7%ba%a7%e7%b4%a2%e5%bc%95%e6%9f%a5%e8%af%a2%e6%98%af%e5%90%a6%e4%bc%9a%e5%9b%9e%e8%a1%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7969\/","title":{"rendered":"\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173138580575066.jpg\" class=\"aligncenter\" title=\"\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\uff1f\u63d2\u56fe\" alt=\"\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5224\u65ad\u901a\u8fc7\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u5b58\u5728\u56de\u8868\u64cd\u4f5c<\/strong><\/p>\n<p>\u5728\u7ed9\u5b9a\u7684\u67e5\u8be2\u4e2d\uff0c\u4f7f\u7528\u4e86\u4e8c\u7ea7\u7d22\u5f15 idx_track_source_id_created_at_len_parse_result_list\u3002\u6839\u636e EXPLAIN \u8f93\u51fa\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u5224\u65ad\u662f\u5426\u5b58\u5728\u56de\u8868\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li><strong>Extra: Using where; Using index; Using temporary; Using filesort<\/strong><\/li>\n<\/ul>\n<p>\u6839\u636e Extra \u5b57\u6bb5\u7684\u63d0\u793a\uff0c\u53ef\u4ee5\u5f97\u51fa\u4ee5\u4e0b\u7ed3\u8bba\uff1a<\/p>\n<ul>\n<li>Using Index\uff1a\u8868\u793a\u4f7f\u7528\u4e86\u4e8c\u7ea7\u7d22\u5f15\u8fdb\u884c\u67e5\u8be2\uff0c\u65e0\u9700\u56de\u8868\u3002<\/li>\n<li>Using where\uff1a\u8868\u793a\u5b58\u5728\u6ee1\u8db3 WHERE \u6761\u4ef6\u7684\u8fc7\u6ee4\uff0c\u9700\u8981\u6839\u636e\u4e8c\u7ea7\u7d22\u5f15\u67e5\u627e\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\uff0c\u7136\u540e\u518d\u8fdb\u884c\u56de\u8868\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u8be5\u67e5\u8be2\u786e\u5b9e\u5b58\u5728\u56de\u8868\u64cd\u4f5c\u3002\u8fd9\u662f\u56e0\u4e3a\u67e5\u8be2\u9700\u8981\u805a\u5408\u6bcf\u4e2a track_source_id \u548c\u65e5\u671f\u7684\u603b\u8ba1\u6570\uff0c\u8fd9\u610f\u5473\u7740\u9700\u8981\u904d\u5386\u6574\u4e2a\u4e8c\u7ea7\u7d22\u5f15\uff0c\u5e76\u5bf9\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\u8fdb\u884c\u8ba1\u6570\u3002<\/p>\n<p><strong>\u5224\u65ad\u4f9d\u636e<\/strong><\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7 EXPLAIN \u8f93\u51fa\u4e2d\u7684 Extra \u5b57\u6bb5\u5224\u65ad\u662f\u5426\u5b58\u5728\u56de\u8868\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>Using Index &amp;&amp; Using where\uff1a\u8868\u793a\u9700\u8981\u56de\u8868\u67e5\u8be2\u3002<\/li>\n<li>Using Index\uff1a\u8868\u793a\u7d22\u5f15\u8986\u76d6\u4e86\u67e5\u8be2\u6240\u9700\u7684\u6240\u6709\u5b57\u6bb5\uff0c\u65e0\u9700\u56de\u8868\u3002<\/li>\n<\/ul>\n<p><strong>\u8865\u5145\u8bf4\u660e<\/strong><\/p>\n<p>\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u7d22\u5f15\u7684\u5305\u542b\u5b57\u6bb5\u662f\u5426\u8986\u76d6\u4e86\u67e5\u8be2\u6240\u9700\u7684\u6240\u6709\u5b57\u6bb5\u3002<\/li>\n<li>WHERE \u5b50\u53e5\u4e2d\u662f\u5426\u6709\u4e0d\u5305\u542b\u5728\u7d22\u5f15\u4e2d\u7684\u5b57\u6bb5\u3002<\/li>\n<li> \u7684\u4f7f\u7528\uff08\u5982 SUM\u3001COUNT\uff09\u3002\u805a\u5408\u51fd\u6570\u901a\u5e38\u9700\u8981\u56de\u8868\u64cd\u4f5c\u624d\u80fd\u5b8c\u6210\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u7d22\u5f15\u65f6\uff0c\u8003\u8651\u67e5\u8be2\u6a21\u5f0f\u5e76\u521b\u5efa\u6db5\u76d6\u5e38\u89c1\u67e5\u8be2\u6240\u9700\u5b57\u6bb5\u7684\u7d22\u5f15\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\uff1f\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>\u5224\u65ad\u901a\u8fc7\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u5b58\u5728\u56de\u8868\u64cd\u4f5c \u5728\u7ed9\u5b9a\u7684\u67e5\u8be2\u4e2d\uff0c\u4f7f\u7528\u4e86\u4e8c\u7ea7\u7d22\u5f15 idx_track_source_id_created_at_len_parse_result_list\u3002\u6839\u636e EXPLAIN \u8f93\u51fa\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u5224\u65ad\u662f\u5426\u5b58\u5728\u56de\u8868\u64cd\u4f5c\uff1a Extra: Using where; Using index; Using temporary; Using filesort \u6839\u636e Extra \u5b57\u6bb5\u7684\u63d0\u793a\uff0c\u53ef\u4ee5\u5f97\u51fa\u4ee5\u4e0b\u7ed3\u8bba\uff1a Using Index\uff1a\u8868\u793a\u4f7f\u7528\u4e86\u4e8c\u7ea7\u7d22\u5f15\u8fdb\u884c\u67e5\u8be2\uff0c\u65e0\u9700\u56de\u8868\u3002 Using where\uff1a\u8868\u793a\u5b58\u5728\u6ee1\u8db3 WHERE \u6761\u4ef6\u7684\u8fc7\u6ee4\uff0c\u9700\u8981\u6839\u636e\u4e8c\u7ea7\u7d22\u5f15\u67e5\u627e\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\uff0c\u7136\u540e\u518d\u8fdb\u884c\u56de\u8868\u67e5\u8be2\u3002 \u56e0\u6b64\uff0c\u8be5\u67e5\u8be2\u786e\u5b9e\u5b58\u5728\u56de\u8868\u64cd\u4f5c\u3002\u8fd9\u662f\u56e0\u4e3a\u67e5\u8be2\u9700\u8981\u805a\u5408\u6bcf\u4e2a track_source_id \u548c\u65e5\u671f\u7684\u603b\u8ba1\u6570\uff0c\u8fd9\u610f\u5473\u7740\u9700\u8981\u904d\u5386\u6574\u4e2a\u4e8c\u7ea7\u7d22\u5f15\uff0c\u5e76\u5bf9\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\u8fdb\u884c\u8ba1\u6570\u3002 \u5224\u65ad\u4f9d\u636e \u53ef\u4ee5\u901a\u8fc7 EXPLAIN \u8f93\u51fa\u4e2d\u7684 Extra \u5b57\u6bb5\u5224\u65ad\u662f\u5426\u5b58\u5728\u56de\u8868\u64cd\u4f5c\uff1a Using Index &amp;&amp; Using where\uff1a\u8868\u793a\u9700\u8981\u56de\u8868\u67e5\u8be2\u3002 Using Index\uff1a\u8868\u793a\u7d22\u5f15\u8986\u76d6\u4e86\u67e5\u8be2\u6240\u9700\u7684\u6240\u6709\u5b57\u6bb5\uff0c\u65e0\u9700\u56de\u8868\u3002 \u8865\u5145\u8bf4\u660e \u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a \u7d22\u5f15\u7684\u5305\u542b\u5b57\u6bb5\u662f\u5426\u8986\u76d6\u4e86\u67e5\u8be2\u6240\u9700\u7684\u6240\u6709\u5b57\u6bb5\u3002 WHERE \u5b50\u53e5\u4e2d\u662f\u5426\u6709\u4e0d\u5305\u542b\u5728\u7d22\u5f15\u4e2d\u7684\u5b57\u6bb5\u3002 \u7684\u4f7f\u7528\uff08\u5982 SUM\u3001COUNT\uff09\u3002\u805a\u5408\u51fd\u6570\u901a\u5e38\u9700\u8981\u56de\u8868\u64cd\u4f5c\u624d\u80fd\u5b8c\u6210\u3002 \u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u7d22\u5f15\u65f6\uff0c\u8003\u8651\u67e5\u8be2\u6a21\u5f0f\u5e76\u521b\u5efa\u6db5\u76d6\u5e38\u89c1\u67e5\u8be2\u6240\u9700\u5b57\u6bb5\u7684\u7d22\u5f15\u975e\u5e38\u91cd\u8981\u3002 \u4ee5\u4e0a\u5c31\u662f\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\u662f\u5426\u4f1a\u56de\u8868\uff1f\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},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7969","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7969","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=7969"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7969\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}