{"id":74435,"date":"2024-10-15T22:27:17","date_gmt":"2024-10-15T14:27:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/74435\/"},"modified":"2024-10-15T22:27:17","modified_gmt":"2024-10-15T14:27:17","slug":"mysql-hash%e7%b4%a2%e5%bc%95%e7%9a%84%e6%87%89%e7%94%a8%e8%88%87%e9%99%90%e5%88%b6%e6%a2%9d%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/74435\/","title":{"rendered":"MySQL Hash\u7d22\u5f15\u7684\u61c9\u7528\u8207\u9650\u5236\u689d\u4ef6"},"content":{"rendered":"<h1 id=\"mysql-hash%e7%b4%a2%e5%bc%95%e7%9a%84%e6%87%89%e7%94%a8%e8%88%87%e9%99%90%e5%88%b6%e6%a2%9d%e4%bb%b6-FtUeHJpIvE\">MySQL Hash\u7d22\u5f15\u7684\u61c9\u7528\u8207\u9650\u5236\u689d\u4ef6<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u91cd\u8981\u5de5\u5177\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662fHash\u7d22\u5f15\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL Hash\u7d22\u5f15\u7684\u61c9\u7528\u5834\u666f\u53ca\u5176\u9650\u5236\u689d\u4ef6\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afhash%e7%b4%a2%e5%bc%95%ef%bc%9f-FtUeHJpIvE\">\u4ec0\u9ebc\u662fHash\u7d22\u5f15\uff1f<\/h2>\n<p>Hash\u7d22\u5f15\u662f\u4e00\u7a2e\u57fa\u65bc\u54c8\u5e0c\u8868\u7684\u7d22\u5f15\u985e\u578b\u3002\u5b83\u901a\u904e\u5c07\u7d22\u5f15\u9375\u9032\u884c\u54c8\u5e0c\u904b\u7b97\uff0c\u5c07\u5176\u6620\u5c04\u5230\u4e00\u500b\u56fa\u5b9a\u5927\u5c0f\u7684\u6578\u7d44\u4e2d\uff0c\u5f9e\u800c\u5be6\u73fe\u5feb\u901f\u67e5\u627e\u3002\u9019\u7a2e\u7d22\u5f15\u7279\u5225\u9069\u5408\u65bc\u7b49\u503c\u67e5\u8a62\uff08\u4f8b\u5982\uff1a\u67e5\u8a62\u67d0\u500b\u7279\u5b9a\u7684ID\u6216\u540d\u7a31\uff09\uff0c\u56e0\u70ba\u54c8\u5e0c\u8868\u7684\u67e5\u627e\u6642\u9593\u8907\u96dc\u5ea6\u70baO(1)\u3002<\/p>\n<h2 id=\"hash%e7%b4%a2%e5%bc%95%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-FtUeHJpIvE\">Hash\u7d22\u5f15\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<ul>\n<li><strong>\u7b49\u503c\u67e5\u8a62\uff1a<\/strong>Hash\u7d22\u5f15\u6700\u9069\u5408\u7528\u65bc\u7b49\u503c\u67e5\u8a62\uff0c\u4f8b\u5982\u67e5\u8a62\u67d0\u500b\u7279\u5b9a\u7684\u7528\u6236ID\u6216\u7522\u54c1ID\u3002\u9019\u985e\u67e5\u8a62\u7684\u6027\u80fd\u512a\u52e2\u660e\u986f\uff0c\u56e0\u70ba\u54c8\u5e0c\u8868\u80fd\u5920\u5feb\u901f\u5b9a\u4f4d\u5230\u6578\u64da\u3002<\/li>\n<li><strong>\u9ad8\u983b\u67e5\u8a62\uff1a<\/strong>\u5728\u9700\u8981\u983b\u7e41\u67e5\u8a62\u7684\u5834\u666f\u4e2d\uff0c\u4f7f\u7528Hash\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u5927\u6578\u64da\u96c6\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u5167\u5b58\u4e2d\u7684\u6578\u64da\uff1a<\/strong>Hash\u7d22\u5f15\u901a\u5e38\u5728\u5167\u5b58\u4e2d\u904b\u884c\uff0c\u56e0\u6b64\u5c0d\u65bc\u9700\u8981\u5feb\u901f\u97ff\u61c9\u7684\u61c9\u7528\uff08\u5982\u5373\u6642\u6578\u64da\u67e5\u8a62\uff09\u975e\u5e38\u5408\u9069\u3002<\/li>\n<\/ul>\n<h2 id=\"hash%e7%b4%a2%e5%bc%95%e7%9a%84%e9%99%90%e5%88%b6%e6%a2%9d%e4%bb%b6-FtUeHJpIvE\">Hash\u7d22\u5f15\u7684\u9650\u5236\u689d\u4ef6<\/h2>\n<p>\u5118\u7ba1Hash\u7d22\u5f15\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u8868\u73fe\u51fa\u8272\uff0c\u4f46\u5b83\u4e5f\u6709\u4e00\u4e9b\u9650\u5236\u689d\u4ef6\uff1a<\/p>\n<ul>\n<li><strong>\u4e0d\u652f\u6301\u7bc4\u570d\u67e5\u8a62\uff1a<\/strong>Hash\u7d22\u5f15\u4e0d\u652f\u6301\u7bc4\u570d\u67e5\u8a62\uff08\u4f8b\u5982\uff1a\u67e5\u8a62\u67d0\u500b\u7bc4\u570d\u5167\u7684\u6578\u64da\uff09\uff0c\u56e0\u70ba\u54c8\u5e0c\u904b\u7b97\u6703\u6253\u4e82\u6578\u64da\u7684\u9806\u5e8f\u3002\u56e0\u6b64\uff0c\u5982\u679c\u61c9\u7528\u4e2d\u9700\u8981\u9032\u884c\u7bc4\u570d\u67e5\u8a62\uff0c\u5247\u4e0d\u9069\u5408\u4f7f\u7528Hash\u7d22\u5f15\u3002<\/li>\n<li><strong>\u54c8\u5e0c\u78b0\u649e\uff1a<\/strong>\u7576\u591a\u500b\u7d22\u5f15\u9375\u7d93\u904e\u54c8\u5e0c\u904b\u7b97\u5f8c\u6620\u5c04\u5230\u540c\u4e00\u500b\u4f4d\u7f6e\u6642\uff0c\u5c31\u6703\u767c\u751f\u54c8\u5e0c\u78b0\u649e\u3002\u9019\u6703\u5c0e\u81f4\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u9700\u8981\u9032\u4e00\u6b65\u6aa2\u67e5\u78b0\u649e\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u4e0d\u652f\u6301\u6392\u5e8f\uff1a<\/strong>Hash\u7d22\u5f15\u7121\u6cd5\u652f\u6301\u6392\u5e8f\u64cd\u4f5c\uff0c\u9019\u610f\u5473\u8457\u5982\u679c\u67e5\u8a62\u9700\u8981\u6392\u5e8f\uff0c\u5247\u5fc5\u9808\u4f7f\u7528\u5176\u4ed6\u985e\u578b\u7684\u7d22\u5f15\u3002<\/li>\n<li><strong>\u5167\u5b58\u6d88\u8017\uff1a<\/strong>Hash\u7d22\u5f15\u901a\u5e38\u9700\u8981\u66f4\u591a\u7684\u5167\u5b58\u4f86\u5b58\u5132\u54c8\u5e0c\u8868\uff0c\u9019\u5728\u5167\u5b58\u6709\u9650\u7684\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6210\u70ba\u4e00\u500b\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8mysql%e4%b8%ad%e4%bd%bf%e7%94%a8hash%e7%b4%a2%e5%bc%95-FtUeHJpIvE\">\u5982\u4f55\u5728MySQL\u4e2d\u4f7f\u7528Hash\u7d22\u5f15<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528Hash\u7d22\u5f15\u76f8\u5c0d\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u5275\u5efa\u8868\u6642\u6307\u5b9aHash\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT NOT NULL,\n    name VARCHAR(100),\n    PRIMARY KEY (id),\n    KEY name_hash (name) USING HASH\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70bausers\u7684\u8868\uff0c\u4e26\u70baname\u5b57\u6bb5\u5275\u5efa\u4e86\u4e00\u500bHash\u7d22\u5f15\u3002\u9019\u6a23\uff0c\u5728\u9032\u884c\u7b49\u503c\u67e5\u8a62\u6642\uff0c\u67e5\u8a62\u6027\u80fd\u5c07\u6703\u5f97\u5230\u63d0\u5347\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FtUeHJpIvE\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684Hash\u7d22\u5f15\u5728\u7279\u5b9a\u7684\u61c9\u7528\u5834\u666f\u4e2d\u80fd\u5920\u63d0\u4f9b\u5353\u8d8a\u7684\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5c0d\u65bc\u7b49\u503c\u67e5\u8a62\u3002\u7136\u800c\uff0c\u5b83\u7684\u9650\u5236\u689d\u4ef6\u4e5f\u4e0d\u5bb9\u5ffd\u8996\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u7bc4\u570d\u67e5\u8a62\u6216\u6392\u5e8f\u7684\u60c5\u6cc1\u4e0b\u3002\u56e0\u6b64\uff0c\u5728\u9078\u64c7\u7d22\u5f15\u985e\u578b\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9032\u884c\u8a55\u4f30\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u9019\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u60a8\u7684\u61c9\u7528\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL Hash\u7d22\u5f15\u7684\u61c9\u7528\u5834\u666f\u53ca\u5176\u9650\u5236\u689d\u4ef6\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5229\u7528\u6b64\u7d22\u5f15\u985e\u578b\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6027\u80fd\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-74435","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74435","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=74435"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74435\/revisions"}],"predecessor-version":[{"id":74436,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74435\/revisions\/74436"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=74435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=74435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=74435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}