{"id":7859,"date":"2024-11-14T16:10:58","date_gmt":"2024-11-14T08:10:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7859\/"},"modified":"2024-11-14T16:10:58","modified_gmt":"2024-11-14T08:10:58","slug":"mysql-%e9%80%89%e6%8b%a9%e6%8c%87%e5%ae%9a%e5%ad%97%e6%ae%b5%e5%af%bc%e8%87%b4%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e7%9a%84%e5%8e%9f%e5%9b%a0%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7859\/","title":{"rendered":"MySQL \u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173130374294317.jpg\" class=\"aligncenter\" title=\"MySQL \u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u63d2\u56fe\" alt=\"MySQL \u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong> \u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0<\/strong><\/p>\n<p>\u5728 mysql \u4e2d\u4f7f\u7528 select \u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u5982\u679c\u9009\u62e9\u7684\u5b57\u6bb5\u4e0d\u5728\u7d22\u5f15\u8986\u76d6\u8303\u56f4\u5185\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u3002\u7d22\u5f15\u8986\u76d6\u662f\u6307\u7d22\u5f15\u4e2d\u5305\u542b\u67e5\u8be2\u4e2d\u6240\u9700\u7684\u6240\u6709\u5b57\u6bb5\uff0c\u65e0\u9700\u4ece\u8868\u4e2d\u83b7\u53d6\u989d\u5916\u6570\u636e\u3002<\/p>\n<p>\u5728\u672c\u4f8b\u4e2d\uff0csql \u8bed\u53e5\u67e5\u8be2\u4e86 dev_device_log \u8868\u4e2d\u591a\u4e2a\u5b57\u6bb5\uff0c\u5305\u62ec pc.name\u3002\u8be5\u5b57\u6bb5\u4e0d\u5728 dev_device_log \u8868\u7684\u7d22\u5f15\u4e2d\u3002\u56e0\u6b64\uff0c\u5f53\u9009\u62e9 pc.name \u5b57\u6bb5\u65f6\uff0cmysql \u4f18\u5316\u5668\u8ba4\u4e3a\u4f7f\u7528\u7d22\u5f15\u6548\u7387\u8f83\u4f4e\uff0c\u8f6c\u800c\u91c7\u7528\u5168\u8868\u626b\u63cf\u3002<\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u53d1\u751f\u5728\u4ee5\u4e0b\u6761\u4ef6\u4e0b\uff1a<\/p>\n<ul>\n<li>\u6240\u9009\u62e9\u7684\u5b57\u6bb5\u4e0d\u5728\u7d22\u5f15\u4e2d\u3002<\/li>\n<li>\u7d22\u5f15\u5305\u542b\u8fc7\u591a\u7684\u5b57\u6bb5\uff0c\u5bfc\u81f4\u7d22\u5f15\u8986\u76d6\u8303\u56f4\u8fc7\u5927\u3002<\/li>\n<\/ul>\n<p>\u8981\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u521b\u5efa\u5305\u542b\u67e5\u8be2\u4e2d\u6240\u9700\u5b57\u6bb5\u7684\u7d22\u5f15\u3002<\/li>\n<li>\u5220\u9664\u7d22\u5f15\u4e2d\u4e0d\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u51cf\u5c0f\u7d22\u5f15\u8986\u76d6\u8303\u56f4\u3002<\/li>\n<\/ul>\n<p>\u9488\u5bf9\u672c\u4f8b\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u4ec5\u5305\u542b dl.id\u3001dl.status \u548c pc.name \u5b57\u6bb5\u7684\u7d22\u5f15\uff1a<\/p>\n<pre>CREATE INDEX idx_device_log_name ON dev_device_log (dl.id, dl.status, pc.name);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u901a\u8fc7\u4f18\u5316\u7d22\u5f15\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u5e76\u9632\u6b62\u7d22\u5f15\u5931\u6548\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fMySQL \u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0\u662f\u4ec0\u4e48\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>\u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0 \u5728 mysql \u4e2d\u4f7f\u7528 select \u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u5982\u679c\u9009\u62e9\u7684\u5b57\u6bb5\u4e0d\u5728\u7d22\u5f15\u8986\u76d6\u8303\u56f4\u5185\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u3002\u7d22\u5f15\u8986\u76d6\u662f\u6307\u7d22\u5f15\u4e2d\u5305\u542b\u67e5\u8be2\u4e2d\u6240\u9700\u7684\u6240\u6709\u5b57\u6bb5\uff0c\u65e0\u9700\u4ece\u8868\u4e2d\u83b7\u53d6\u989d\u5916\u6570\u636e\u3002 \u5728\u672c\u4f8b\u4e2d\uff0csql \u8bed\u53e5\u67e5\u8be2\u4e86 dev_device_log \u8868\u4e2d\u591a\u4e2a\u5b57\u6bb5\uff0c\u5305\u62ec pc.name\u3002\u8be5\u5b57\u6bb5\u4e0d\u5728 dev_device_log \u8868\u7684\u7d22\u5f15\u4e2d\u3002\u56e0\u6b64\uff0c\u5f53\u9009\u62e9 pc.name \u5b57\u6bb5\u65f6\uff0cmysql \u4f18\u5316\u5668\u8ba4\u4e3a\u4f7f\u7528\u7d22\u5f15\u6548\u7387\u8f83\u4f4e\uff0c\u8f6c\u800c\u91c7\u7528\u5168\u8868\u626b\u63cf\u3002 \u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u53d1\u751f\u5728\u4ee5\u4e0b\u6761\u4ef6\u4e0b\uff1a \u6240\u9009\u62e9\u7684\u5b57\u6bb5\u4e0d\u5728\u7d22\u5f15\u4e2d\u3002 \u7d22\u5f15\u5305\u542b\u8fc7\u591a\u7684\u5b57\u6bb5\uff0c\u5bfc\u81f4\u7d22\u5f15\u8986\u76d6\u8303\u56f4\u8fc7\u5927\u3002 \u8981\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4ee5\u4e0b\u65b9\u6cd5\uff1a \u521b\u5efa\u5305\u542b\u67e5\u8be2\u4e2d\u6240\u9700\u5b57\u6bb5\u7684\u7d22\u5f15\u3002 \u5220\u9664\u7d22\u5f15\u4e2d\u4e0d\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u51cf\u5c0f\u7d22\u5f15\u8986\u76d6\u8303\u56f4\u3002 \u9488\u5bf9\u672c\u4f8b\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u4ec5\u5305\u542b dl.id\u3001dl.status \u548c pc.name \u5b57\u6bb5\u7684\u7d22\u5f15\uff1a CREATE INDEX idx_device_log_name ON dev_device_log (dl.id, dl.status, pc.name); \u767b\u5f55\u540e\u590d\u5236 \u901a\u8fc7\u4f18\u5316\u7d22\u5f15\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u5e76\u9632\u6b62\u7d22\u5f15\u5931\u6548\u3002 \u4ee5\u4e0a\u5c31\u662fMySQL \u9009\u62e9\u6307\u5b9a\u5b57\u6bb5\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0\u662f\u4ec0\u4e48\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-7859","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7859","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=7859"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7859\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7859"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7859"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}