{"id":75822,"date":"2024-10-16T01:31:16","date_gmt":"2024-10-15T17:31:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75822\/"},"modified":"2024-10-16T01:31:16","modified_gmt":"2024-10-15T17:31:16","slug":"mysql-%e6%9f%a5%e8%a9%a2%e7%94%a8%e8%aa%bf%e5%ba%a6%e8%88%87%e9%8e%96%e5%ae%9a%e4%be%86%e8%aa%bf%e5%84%aa","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75822\/","title":{"rendered":"MySQL \u67e5\u8a62\u7528\u8abf\u5ea6\u8207\u9396\u5b9a\u4f86\u8abf\u512a"},"content":{"rendered":"<h1 id=\"mysql-%e6%9f%a5%e8%a9%a2%e7%94%a8%e8%aa%bf%e5%ba%a6%e8%88%87%e9%8e%96%e5%ae%9a%e4%be%86%e8%aa%bf%e5%84%aa-hFuKVKvRic\">MySQL \u67e5\u8a62\u7528\u8abf\u5ea6\u8207\u9396\u5b9a\u4f86\u8abf\u512a<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMySQL \u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u67e5\u8a62\u6027\u80fd\u7684\u512a\u5316\u8b8a\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u901a\u904e\u67e5\u8a62\u8abf\u5ea6\u8207\u9396\u5b9a\u4f86\u512a\u5316 MySQL \u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e8%aa%bf%e5%ba%a6%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-hFuKVKvRic\">\u67e5\u8a62\u8abf\u5ea6\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u67e5\u8a62\u8abf\u5ea6\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u5408\u7406\u5b89\u6392\u67e5\u8a62\u7684\u57f7\u884c\u9806\u5e8f\uff0c\u4ee5\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002\u9019\u4e00\u904e\u7a0b\u6d89\u53ca\u5230\u591a\u500b\u65b9\u9762\uff0c\u5305\u62ec\u67e5\u8a62\u7684\u512a\u5316\u3001\u7d22\u5f15\u7684\u4f7f\u7528\u4ee5\u53ca\u8cc7\u6e90\u7684\u5408\u7406\u5206\u914d\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96-hFuKVKvRic\">\u67e5\u8a62\u512a\u5316<\/h3>\n<p>\u67e5\u8a62\u512a\u5316\u662f\u63d0\u9ad8 MySQL \u6027\u80fd\u7684\u95dc\u9375\u3002\u901a\u904e\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u53ef\u4ee5\u627e\u51fa\u6027\u80fd\u74f6\u9838\u3002\u4f7f\u7528 <code>EXPLAIN<\/code> \u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE age &gt; 30;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u986f\u793a MySQL \u5982\u4f55\u57f7\u884c\u8a72\u67e5\u8a62\uff0c\u5305\u62ec\u4f7f\u7528\u7684\u7d22\u5f15\u548c\u9810\u8a08\u7684\u884c\u6578\u3002\u6839\u64da\u9019\u4e9b\u4fe1\u606f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8abf\u6574\u67e5\u8a62\u6216\u6dfb\u52a0\u7d22\u5f15\u4f86\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h3 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e4%bd%bf%e7%94%a8-hFuKVKvRic\">\u7d22\u5f15\u7684\u4f7f\u7528<\/h3>\n<p>\u7d22\u5f15\u662f\u52a0\u901f\u67e5\u8a62\u7684\u6709\u6548\u5de5\u5177\u3002\u6b63\u78ba\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff0c\u61c9\u8003\u616e\u5275\u5efa\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_age ON users(age);<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u52a0\u901f\u57fa\u65bc\u5e74\u9f61\u7684\u67e5\u8a62\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u9032\u884c\u5e73\u8861\u3002<\/p>\n<h2 id=\"%e9%8e%96%e5%ae%9a%e6%a9%9f%e5%88%b6%e7%9a%84%e7%90%86%e8%a7%a3-hFuKVKvRic\">\u9396\u5b9a\u6a5f\u5236\u7684\u7406\u89e3<\/h2>\n<p>\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\uff0c\u9396\u5b9a\u6a5f\u5236\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u7684\u91cd\u8981\u624b\u6bb5\u3002MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u5b9a\u985e\u578b\uff0c\u5305\u62ec\u884c\u9396\u548c\u8868\u9396\u3002\u4e86\u89e3\u9019\u4e9b\u9396\u5b9a\u7684\u7279\u6027\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u8a2d\u8a08\u67e5\u8a62\u3002<\/p>\n<h3 id=\"%e8%a1%8c%e9%8e%96%e8%88%87%e8%a1%a8%e9%8e%96-hFuKVKvRic\">\u884c\u9396\u8207\u8868\u9396<\/h3>\n<ul>\n<li><strong>\u884c\u9396\uff1a<\/strong>\u884c\u9396\u53ea\u9396\u5b9a\u88ab\u67e5\u8a62\u7684\u884c\uff0c\u5141\u8a31\u5176\u4ed6\u7528\u6236\u8a2a\u554f\u5176\u4ed6\u884c\uff0c\u9069\u5408\u9ad8\u4f75\u767c\u7684\u5834\u666f\u3002<\/li>\n<li><strong>\u8868\u9396\uff1a<\/strong>\u8868\u9396\u6703\u9396\u5b9a\u6574\u500b\u8868\uff0c\u9069\u5408\u9700\u8981\u4fdd\u8b49\u6574\u9ad4\u4e00\u81f4\u6027\u7684\u64cd\u4f5c\uff0c\u4f46\u6703\u964d\u4f4e\u4e26\u767c\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u5728\u8a2d\u8a08\u67e5\u8a62\u6642\uff0c\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9396\u5b9a\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c\u5728\u9032\u884c\u6279\u91cf\u66f4\u65b0\u6642\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u8868\u9396\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h3 id=\"%e9%81%bf%e5%85%8d%e6%ad%bb%e9%8e%96-hFuKVKvRic\">\u907f\u514d\u6b7b\u9396<\/h3>\n<p>\u6b7b\u9396\u662f\u591a\u500b\u4e8b\u52d9\u4e92\u76f8\u7b49\u5f85\u5c0d\u65b9\u91cb\u653e\u9396\u7684\u60c5\u6cc1\uff0c\u6703\u5c0e\u81f4\u7cfb\u7d71\u7121\u6cd5\u7e7c\u7e8c\u904b\u884c\u3002\u70ba\u4e86\u907f\u514d\u6b7b\u9396\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6240\u6709\u4e8b\u52d9\u4ee5\u76f8\u540c\u7684\u9806\u5e8f\u7372\u53d6\u9396\u3002<\/li>\n<li>\u8a2d\u7f6e\u5408\u7406\u7684\u9396\u8d85\u6642\u6642\u9593\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u67e5\u8a62\uff0c\u6e1b\u5c11\u9396\u7684\u6301\u6709\u6642\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-hFuKVKvRic\">\u7d50\u8ad6<\/h2>\n<p>\u901a\u904e\u5408\u7406\u7684\u67e5\u8a62\u8abf\u5ea6\u8207\u9396\u5b9a\u6a5f\u5236\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8 MySQL \u7684\u6027\u80fd\u3002\u512a\u5316\u67e5\u8a62\u3001\u5408\u7406\u4f7f\u7528\u7d22\u5f15\u4ee5\u53ca\u7406\u89e3\u9396\u5b9a\u6a5f\u5236\u662f\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9019\u4e9b\u6280\u8853\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u512a\u5316\u60a8\u7684\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u901a\u904e\u67e5\u8a62\u8abf\u5ea6\u8207\u9396\u5b9a\u6280\u8853\u512a\u5316 MySQL \u6027\u80fd\uff0c\u63d0\u9ad8\u6578\u64da\u5eab\u6548\u7387\u8207\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-75822","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75822","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=75822"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75822\/revisions"}],"predecessor-version":[{"id":75823,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75822\/revisions\/75823"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}