{"id":161217,"date":"2024-11-04T04:35:25","date_gmt":"2024-11-03T20:35:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161217\/"},"modified":"2024-11-04T04:35:26","modified_gmt":"2024-11-03T20:35:26","slug":"%e5%9f%ba%e6%96%bc-hash-%e7%ae%97%e6%b3%95%e7%9a%84-mysql-%e5%88%86%e8%a1%a8%e8%99%95%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161217\/","title":{"rendered":"\u57fa\u65bc Hash \u7b97\u6cd5\u7684 Mysql \u5206\u8868\u8655\u7406"},"content":{"rendered":"<h1 id=\"%e5%9f%ba%e6%96%bc-hash-%e7%ae%97%e6%b3%95%e7%9a%84-mysql-%e5%88%86%e8%a1%a8%e8%99%95%e7%90%86-LocxZQPGcb\">\u57fa\u65bc Hash \u7b97\u6cd5\u7684 MySQL \u5206\u8868\u8655\u7406<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u55ae\u4e00\u6578\u64da\u8868\u7684\u67e5\u8a62\u6548\u7387\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u9019\u6642\u5019\u5206\u8868\u6280\u8853\u4fbf\u6210\u70ba\u4e86\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u57fa\u65bc Hash \u7b97\u6cd5\u7684 MySQL \u5206\u8868\u8655\u7406\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u5be6\u4f5c\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%88%86%e8%a1%a8%ef%bc%9f-LocxZQPGcb\">\u4ec0\u9ebc\u662f\u5206\u8868\uff1f<\/h2>\n<p>\u5206\u8868\u662f\u5c07\u4e00\u500b\u5927\u578b\u6578\u64da\u8868\u62c6\u5206\u6210\u591a\u500b\u5c0f\u578b\u6578\u64da\u8868\u7684\u904e\u7a0b\u3002\u9019\u6a23\u505a\u7684\u76ee\u7684\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3001\u6e1b\u5c11\u9396\u7af6\u722d\u4ee5\u53ca\u63d0\u5347\u6578\u64da\u7684\u53ef\u7ba1\u7406\u6027\u3002\u5206\u8868\u53ef\u4ee5\u6839\u64da\u4e0d\u540c\u7684\u7b56\u7565\u9032\u884c\uff0c\u4f8b\u5982\u7bc4\u570d\u5206\u8868\u3001\u5217\u8868\u5206\u8868\u548c Hash \u5206\u8868\u7b49\u3002<\/p>\n<h2 id=\"hash-%e5%88%86%e8%a1%a8%e7%9a%84%e5%8e%9f%e7%90%86-LocxZQPGcb\">Hash \u5206\u8868\u7684\u539f\u7406<\/h2>\n<p>Hash \u5206\u8868\u662f\u6839\u64da\u67d0\u500b\u5b57\u6bb5\u7684 Hash \u503c\u4f86\u6c7a\u5b9a\u6578\u64da\u61c9\u8a72\u5b58\u5132\u5728\u54ea\u4e00\u500b\u5b50\u8868\u4e2d\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u9ede\u5728\u65bc\u80fd\u5920\u5747\u52fb\u5730\u5206\u914d\u6578\u64da\uff0c\u5f9e\u800c\u907f\u514d\u67d0\u4e9b\u8868\u904e\u65bc\u9f90\u5927\u800c\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n<p>\u5177\u9ad4\u4f86\u8aaa\uff0cHash \u5206\u8868\u7684\u904e\u7a0b\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u9078\u64c7\u4e00\u500b\u9069\u5408\u7684\u5b57\u6bb5\u4f5c\u70ba\u5206\u8868\u7684\u4f9d\u64da\uff0c\u901a\u5e38\u662f\u4e3b\u9375\u6216\u5176\u4ed6\u5177\u6709\u552f\u4e00\u6027\u7684\u5b57\u6bb5\u3002<\/li>\n<li>\u8a08\u7b97\u8a72\u5b57\u6bb5\u7684 Hash \u503c\uff0c\u7136\u5f8c\u6839\u64da Hash \u503c\u5c0d\u5b50\u8868\u9032\u884c\u53d6\u6a21\u904b\u7b97\uff0c\u4ee5\u78ba\u5b9a\u6578\u64da\u61c9\u8a72\u5b58\u5132\u5728\u54ea\u4e00\u500b\u5b50\u8868\u4e2d\u3002<\/li>\n<li>\u5c07\u6578\u64da\u63d2\u5165\u5230\u76f8\u61c9\u7684\u5b50\u8868\u4e2d\u3002<\/li>\n<\/ol>\n<h2 id=\"hash-%e5%88%86%e8%a1%a8%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-LocxZQPGcb\">Hash \u5206\u8868\u7684\u512a\u7f3a\u9ede<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-LocxZQPGcb\">\u512a\u9ede<\/h3>\n<ul>\n<li><strong>\u5747\u52fb\u5206\u914d\u6578\u64da\uff1a<\/strong>Hash \u5206\u8868\u80fd\u5920\u6709\u6548\u5730\u5c07\u6578\u64da\u5747\u52fb\u5206\u914d\u5230\u5404\u500b\u5b50\u8868\u4e2d\uff0c\u907f\u514d\u4e86\u6578\u64da\u96c6\u4e2d\u5728\u67d0\u4e00\u500b\u8868\u7684\u60c5\u6cc1\u3002<\/li>\n<li><strong>\u7c21\u5316\u67e5\u8a62\uff1a<\/strong>\u7531\u65bc\u6578\u64da\u662f\u6839\u64da Hash \u503c\u5206\u914d\u7684\uff0c\u67e5\u8a62\u6642\u53ea\u9700\u8a08\u7b97 Hash \u503c\u5373\u53ef\u5feb\u901f\u5b9a\u4f4d\u5230\u76f8\u61c9\u7684\u5b50\u8868\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-LocxZQPGcb\">\u7f3a\u9ede<\/h3>\n<ul>\n<li><strong>\u96e3\u4ee5\u9032\u884c\u7bc4\u570d\u67e5\u8a62\uff1a<\/strong>Hash \u5206\u8868\u4e0d\u9069\u5408\u9032\u884c\u7bc4\u570d\u67e5\u8a62\uff0c\u56e0\u70ba\u6578\u64da\u662f\u96a8\u6a5f\u5206\u914d\u7684\uff0c\u7121\u6cd5\u4fdd\u8b49\u67e5\u8a62\u7d50\u679c\u7684\u9023\u7e8c\u6027\u3002<\/li>\n<li><strong>\u589e\u52a0\u7ba1\u7406\u8907\u96dc\u6027\uff1a<\/strong>\u96a8\u8457\u5b50\u8868\u6578\u91cf\u7684\u589e\u52a0\uff0c\u6578\u64da\u7684\u7ba1\u7406\u548c\u7dad\u8b77\u8b8a\u5f97\u66f4\u52a0\u8907\u96dc\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e4%bd%9c%e7%af%84%e4%be%8b-LocxZQPGcb\">\u5be6\u4f5c\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 MySQL Hash \u5206\u8868\u7684\u5be6\u4f5c\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE user_0 (\n    id INT PRIMARY KEY,\n    name VARCHAR(100)\n);\n\nCREATE TABLE user_1 (\n    id INT PRIMARY KEY,\n    name VARCHAR(100)\n);\n\nCREATE TABLE user_2 (\n    id INT PRIMARY KEY,\n    name VARCHAR(100)\n);\n\nDELIMITER \/\/\n\nCREATE PROCEDURE insert_user(IN user_id INT, IN user_name VARCHAR(100))\nBEGIN\n    DECLARE table_index INT;\n    SET table_index = MOD(user_id, 3); -- \u5047\u8a2d\u6709 3 \u500b\u5b50\u8868\n    SET @sql = CONCAT('INSERT INTO user_', table_index, ' (id, name) VALUES (?, ?)');\n    PREPARE stmt FROM @sql;\n    SET @id = user_id;\n    SET @name = user_name;\n    EXECUTE stmt USING @id, @name;\n    DEALLOCATE PREPARE stmt;\nEND \/\/\n\nDELIMITER ;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e09\u500b\u5b50\u8868\uff0c\u4e26\u901a\u904e\u5b58\u5132\u904e\u7a0b\u4f86\u63d2\u5165\u6578\u64da\u3002\u6839\u64da\u7528\u6236 ID \u7684 Hash \u503c\uff0c\u6211\u5011\u53ef\u4ee5\u78ba\u5b9a\u6578\u64da\u61c9\u8a72\u63d2\u5165\u5230\u54ea\u4e00\u500b\u5b50\u8868\u4e2d\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-LocxZQPGcb\">\u7d50\u8ad6<\/h2>\n<p>\u57fa\u65bc Hash \u7b97\u6cd5\u7684 MySQL \u5206\u8868\u8655\u7406\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u7ba1\u7406\u6280\u8853\uff0c\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u3002\u96d6\u7136\u5b83\u6709\u4e00\u4e9b\u7f3a\u9ede\uff0c\u4f46\u5728\u7279\u5b9a\u7684\u61c9\u7528\u5834\u666f\u4e2d\uff0cHash \u5206\u8868\u4ecd\u7136\u662f\u4e00\u500b\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u5206\u8868\u7b56\u7565\u5c07\u5c0d\u6574\u9ad4\u7cfb\u7d71\u7684\u6027\u80fd\u7522\u751f\u91cd\u8981\u5f71\u97ff\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u57fa\u65bc Hash \u7b97\u6cd5\u7684 MySQL \u5206\u8868\u8655\u7406\u6280\u8853\uff0c\u63d0\u9ad8\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u5be6\u73fe\u9748\u6d3b\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\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-161217","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161217","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=161217"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161217\/revisions"}],"predecessor-version":[{"id":161218,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161217\/revisions\/161218"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}