{"id":5243,"date":"2024-11-14T09:42:41","date_gmt":"2024-11-14T01:42:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5243\/"},"modified":"2024-11-14T09:42:41","modified_gmt":"2024-11-14T01:42:41","slug":"mysql%e5%88%86%e9%a1%b5%e6%85%a2%e6%80%8e%e4%b9%88%e8%a7%a3%e5%86%b3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5243\/","title":{"rendered":"mysql\u5206\u9875\u6162\u600e\u4e48\u89e3\u51b3"},"content":{"rendered":"<p><strong> \u5206\u9875\u67e5\u8be2\u6027\u80fd\u4f18\u5316<\/strong><\/p>\n<p><strong>\u5982\u4f55\u89e3\u51b3 MySQL \u5206\u9875\u67e5\u8be2\u6027\u80fd\u6162\u7684\u95ee\u9898\uff1f<\/strong><\/p>\n<p>MySQL \u5206\u9875\u67e5\u8be2\u6027\u80fd\u6162\u901a\u5e38\u662f\u7531\u7d22\u5f15\u4f7f\u7528\u4e0d\u5f53\u3001\u6570\u636e\u91cf\u8fc7\u5927\u6216\u786c\u4ef6\u8d44\u6e90\u4e0d\u8db3\u7b49\u56e0\u7d20\u9020\u6210\u7684\u3002\u4ee5\u4e0b\u662f\u89e3\u51b3\u8be5\u95ee\u9898\u7684\u5e38\u89c1\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528\u5408\u9002\u7684\u7d22\u5f15<\/strong><\/p>\n<ul>\n<li>\u4e3a\u5206\u9875\u67e5\u8be2\u4e2d\u4f7f\u7528\u7684\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\u3002<\/li>\n<li>\u4f7f\u7528\u8986\u76d6\u7d22\u5f15\uff0c\u5373\u7d22\u5f15\u5305\u542b\u67e5\u8be2\u4e2d\u9700\u8981\u7684\u6240\u6709\u5b57\u6bb5\u3002<\/li>\n<li>\u907f\u514d\u4f7f\u7528\u591a\u5217\u7d22\u5f15\uff0c\u56e0\u4e3a\u5b83\u4eec\u53ef\u80fd\u5bfc\u81f4\u7d22\u5f15\u788e\u7247\u548c\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<p><strong>2. \u4f18\u5316\u67e5\u8be2\u8bed\u53e5<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528 LIMIT \u5b50\u53e5\u663e\u5f0f\u6307\u5b9a\u8981\u8fd4\u56de\u7684\u884c\u6570\u3002<\/li>\n<li>\u907f\u514d\u5728\u5206\u9875\u67e5\u8be2\u4e2d\u4f7f\u7528 DISTINCT \u6216 GROUP BY \u8bed\u53e5\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f1a\u964d\u4f4e\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<li>\u8003\u8651\u4f7f\u7528\u5b50\u67e5\u8be2\u6216 CTE (Common Table Expression) \u6765\u4f18\u5316\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<p><strong>3. \u51cf\u5c11\u6570\u636e\u91cf<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u6570\u636e\u8868\u975e\u5e38\u5927\uff0c\u8003\u8651\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u533a\uff0c\u4ece\u800c\u51cf\u5c11\u9700\u8981\u67e5\u8be2\u7684\u6570\u636e\u91cf\u3002<\/li>\n<li>\u4f7f\u7528 WHERE \u5b50\u53e5\u8fc7\u6ee4\u51fa\u4e0d\u9700\u8981\u7684\u884c\u3002<\/li>\n<li>\u4f7f\u7528 JOIN \u8bed\u53e5\u8fde\u63a5\u76f8\u5173\u8868\uff0c\u907f\u514d\u8fd4\u56de\u91cd\u590d\u6570\u636e\u3002<\/li>\n<\/ul>\n<p><strong>4. \u4f18\u5316\u786c\u4ef6\u8d44\u6e90<\/strong><\/p>\n<ul>\n<li>\u786e\u4fdd\u670d\u52a1\u5668\u5177\u6709\u8db3\u591f\u7684\u5185\u5b58\u548c CPU \u8d44\u6e90\u6765\u5904\u7406\u5206\u9875\u67e5\u8be2\u3002<\/li>\n<li>\u8003\u8651\u4f7f\u7528 SSD (\u56fa\u6001\u786c\u76d8) \u6765\u5b58\u50a8\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u78c1\u76d8 I\/O \u6027\u80fd\u3002<\/li>\n<li>\u76d1\u63a7\u670d\u52a1\u5668\u6027\u80fd\u4ee5\u8bc6\u522b\u6027\u80fd\u74f6\u9888\u3002<\/li>\n<\/ul>\n<p><strong>\u5176\u4ed6\u6280\u5de7<\/strong><\/p>\n<ul>\n<li>\u7f13\u5b58\u5206\u9875\u7ed3\u679c\uff0c\u4ee5\u51cf\u5c11\u540e\u7eed\u67e5\u8be2\u7684\u5f00\u9500\u3002<\/li>\n<li>\u8003\u8651\u4f7f\u7528\u7b2c\u4e09\u65b9\u5206\u9875\u5e93\u6216\u63d2\u4ef6\uff0c\u5b83\u4eec\u53ef\u80fd\u63d0\u4f9b\u66f4\u4f18\u5316\u7684\u5b9e\u73b0\u3002<\/li>\n<li>\u542f\u7528 MySQL \u7684\u67e5\u8be2\u7f13\u5b58\uff0c\u4f46\u8981\u6ce8\u610f\u5b83\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7f13\u5b58\u4e0d\u4e00\u81f4\u3002<\/li>\n<li>\u907f\u514d\u9891\u7e41\u6267\u884c\u5206\u9875\u67e5\u8be2\uff0c\u5c24\u5176\u662f\u5bf9\u5927\u6570\u636e\u96c6\u8fdb\u884c\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5206\u9875\u6162\u600e\u4e48\u89e3\u51b3\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>\u5206\u9875\u67e5\u8be2\u6027\u80fd\u4f18\u5316 \u5982\u4f55\u89e3\u51b3 MySQL \u5206\u9875\u67e5\u8be2\u6027\u80fd\u6162\u7684\u95ee\u9898\uff1f MySQL \u5206\u9875\u67e5\u8be2\u6027\u80fd\u6162\u901a\u5e38\u662f\u7531\u7d22\u5f15\u4f7f\u7528\u4e0d\u5f53\u3001\u6570\u636e\u91cf\u8fc7\u5927\u6216\u786c\u4ef6\u8d44\u6e90\u4e0d\u8db3\u7b49\u56e0\u7d20\u9020\u6210\u7684\u3002\u4ee5\u4e0b\u662f\u89e3\u51b3\u8be5\u95ee\u9898\u7684\u5e38\u89c1\u65b9\u6cd5\uff1a 1. \u4f7f\u7528\u5408\u9002\u7684\u7d22\u5f15 \u4e3a\u5206\u9875\u67e5\u8be2\u4e2d\u4f7f\u7528\u7684\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\u3002 \u4f7f\u7528\u8986\u76d6\u7d22\u5f15\uff0c\u5373\u7d22\u5f15\u5305\u542b\u67e5\u8be2\u4e2d\u9700\u8981\u7684\u6240\u6709\u5b57\u6bb5\u3002 \u907f\u514d\u4f7f\u7528\u591a\u5217\u7d22\u5f15\uff0c\u56e0\u4e3a\u5b83\u4eec\u53ef\u80fd\u5bfc\u81f4\u7d22\u5f15\u788e\u7247\u548c\u6027\u80fd\u4e0b\u964d\u3002 2. \u4f18\u5316\u67e5\u8be2\u8bed\u53e5 \u4f7f\u7528 LIMIT \u5b50\u53e5\u663e\u5f0f\u6307\u5b9a\u8981\u8fd4\u56de\u7684\u884c\u6570\u3002 \u907f\u514d\u5728\u5206\u9875\u67e5\u8be2\u4e2d\u4f7f\u7528 DISTINCT \u6216 GROUP BY \u8bed\u53e5\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f1a\u964d\u4f4e\u67e5\u8be2\u6027\u80fd\u3002 \u8003\u8651\u4f7f\u7528\u5b50\u67e5\u8be2\u6216 CTE (Common Table Expression) \u6765\u4f18\u5316\u67e5\u8be2\u3002 3. \u51cf\u5c11\u6570\u636e\u91cf \u5982\u679c\u6570\u636e\u8868\u975e\u5e38\u5927\uff0c\u8003\u8651\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u533a\uff0c\u4ece\u800c\u51cf\u5c11\u9700\u8981\u67e5\u8be2\u7684\u6570\u636e\u91cf\u3002 \u4f7f\u7528 WHERE \u5b50\u53e5\u8fc7\u6ee4\u51fa\u4e0d\u9700\u8981\u7684\u884c\u3002 \u4f7f\u7528 JOIN \u8bed\u53e5\u8fde\u63a5\u76f8\u5173\u8868\uff0c\u907f\u514d\u8fd4\u56de\u91cd\u590d\u6570\u636e\u3002 4. \u4f18\u5316\u786c\u4ef6\u8d44\u6e90 \u786e\u4fdd\u670d\u52a1\u5668\u5177\u6709\u8db3\u591f\u7684\u5185\u5b58\u548c CPU \u8d44\u6e90\u6765\u5904\u7406\u5206\u9875\u67e5\u8be2\u3002 \u8003\u8651\u4f7f\u7528 SSD (\u56fa\u6001\u786c\u76d8) \u6765\u5b58\u50a8\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u78c1\u76d8 I\/O \u6027\u80fd\u3002 \u76d1\u63a7\u670d\u52a1\u5668\u6027\u80fd\u4ee5\u8bc6\u522b\u6027\u80fd\u74f6\u9888\u3002 \u5176\u4ed6\u6280\u5de7 \u7f13\u5b58\u5206\u9875\u7ed3\u679c\uff0c\u4ee5\u51cf\u5c11\u540e\u7eed\u67e5\u8be2\u7684\u5f00\u9500\u3002 \u8003\u8651\u4f7f\u7528\u7b2c\u4e09\u65b9\u5206\u9875\u5e93\u6216\u63d2\u4ef6\uff0c\u5b83\u4eec\u53ef\u80fd\u63d0\u4f9b\u66f4\u4f18\u5316\u7684\u5b9e\u73b0\u3002 \u542f\u7528 MySQL \u7684\u67e5\u8be2\u7f13\u5b58\uff0c\u4f46\u8981\u6ce8\u610f\u5b83\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7f13\u5b58\u4e0d\u4e00\u81f4\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-5243","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5243","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=5243"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5243\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}