{"id":95368,"date":"2024-10-20T00:28:17","date_gmt":"2024-10-19T16:28:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95368\/"},"modified":"2024-10-20T00:28:18","modified_gmt":"2024-10-19T16:28:18","slug":"oracle%e4%bd%bf%e7%94%a8hash%e5%88%86%e5%8d%80%e5%84%aa%e5%8c%96%e5%88%86%e6%9e%90%e5%87%bd%e6%95%b8%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95368\/","title":{"rendered":"Oracle\u4f7f\u7528hash\u5206\u5340\u512a\u5316\u5206\u6790\u51fd\u6578\u67e5\u8a62"},"content":{"rendered":"<h1 id=\"oracle%e4%bd%bf%e7%94%a8hash%e5%88%86%e5%8d%80%e5%84%aa%e5%8c%96%e5%88%86%e6%9e%90%e5%87%bd%e6%95%b8%e6%9f%a5%e8%a9%a2-IyRRMEhNFx\">Oracle\u4f7f\u7528hash\u5206\u5340\u512a\u5316\u5206\u6790\u51fd\u6578\u67e5\u8a62<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u67e5\u8a62\u6027\u80fd\u7684\u512a\u5316\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u7684\u91cd\u8981\u4efb\u52d9\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u5206\u5340\u6280\u8853\uff0c\u5176\u4e2dhash\u5206\u5340\u662f\u4e00\u7a2e\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528\u5206\u6790\u51fd\u6578\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u4e2dhash\u5206\u5340\u7684\u6982\u5ff5\u53ca\u5176\u5728\u5206\u6790\u51fd\u6578\u67e5\u8a62\u4e2d\u7684\u512a\u5316\u6548\u679c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afhash%e5%88%86%e5%8d%80%ef%bc%9f-IyRRMEhNFx\">\u4ec0\u9ebc\u662fhash\u5206\u5340\uff1f<\/h2>\n<p>hash\u5206\u5340\u662f\u4e00\u7a2e\u5c07\u6578\u64da\u6839\u64da\u7279\u5b9a\u7684\u54c8\u5e0c\u51fd\u6578\u5206\u914d\u5230\u4e0d\u540c\u5206\u5340\u7684\u6280\u8853\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u4e3b\u8981\u512a\u52e2\u5728\u65bc\u80fd\u5920\u5747\u52fb\u5730\u5206\u914d\u6578\u64da\uff0c\u5f9e\u800c\u907f\u514d\u67d0\u4e9b\u5206\u5340\u904e\u65bc\u64c1\u64e0\u800c\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\u3002\u7576\u6578\u64da\u91cf\u9f90\u5927\u6642\uff0chash\u5206\u5340\u80fd\u5920\u6709\u6548\u5730\u63d0\u9ad8\u67e5\u8a62\u7684\u4e26\u884c\u6027\u548c\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n<h2 id=\"%e5%88%86%e6%9e%90%e5%87%bd%e6%95%b8%e7%9a%84%e6%a6%82%e5%bf%b5-IyRRMEhNFx\">\u5206\u6790\u51fd\u6578\u7684\u6982\u5ff5<\/h2>\n<p>\u5206\u6790\u51fd\u6578\u662fSQL\u4e2d\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5141\u8a31\u7528\u6236\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u9032\u884c\u8a08\u7b97\u800c\u4e0d\u9700\u8981\u5c07\u6578\u64da\u5206\u7d44\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5728\u4e0d\u6539\u8b8a\u67e5\u8a62\u7d50\u679c\u7684\u60c5\u6cc1\u4e0b\uff0c\u63d0\u4f9b\u984d\u5916\u7684\u8a08\u7b97\u7d50\u679c\uff0c\u4f8b\u5982\u7d2f\u8a08\u548c\u3001\u6392\u540d\u7b49\u3002\u5e38\u898b\u7684\u5206\u6790\u51fd\u6578\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>ROW_NUMBER()<\/code><\/li>\n<li><code>RANK()<\/code><\/li>\n<li><code>DENSE_RANK()<\/code><\/li>\n<li><code>SUM()<\/code><\/li>\n<\/ul>\n<h2 id=\"hash%e5%88%86%e5%8d%80%e5%a6%82%e4%bd%95%e5%84%aa%e5%8c%96%e5%88%86%e6%9e%90%e5%87%bd%e6%95%b8%e6%9f%a5%e8%a9%a2-IyRRMEhNFx\">hash\u5206\u5340\u5982\u4f55\u512a\u5316\u5206\u6790\u51fd\u6578\u67e5\u8a62<\/h2>\n<p>\u5728\u4f7f\u7528\u5206\u6790\u51fd\u6578\u6642\uff0chash\u5206\u5340\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u5e7e\u500b\u95dc\u9375\u9ede\uff1a<\/p>\n<h3 id=\"1-%e6%8f%90%e9%ab%98%e4%b8%a6%e8%a1%8c%e8%99%95%e7%90%86%e8%83%bd%e5%8a%9b-IyRRMEhNFx\">1. \u63d0\u9ad8\u4e26\u884c\u8655\u7406\u80fd\u529b<\/h3>\n<p>\u7531\u65bchash\u5206\u5340\u5c07\u6578\u64da\u5747\u52fb\u5206\u914d\u5230\u4e0d\u540c\u7684\u5206\u5340\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u53ef\u4ee5\u5728\u591a\u500b\u5206\u5340\u4e0a\u4e26\u884c\u57f7\u884c\u3002\u9019\u7a2e\u4e26\u884c\u8655\u7406\u80fd\u529b\u80fd\u5920\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h3 id=\"2-%e6%b8%9b%e5%b0%91i-o%e6%93%8d%e4%bd%9c-IyRRMEhNFx\">2. \u6e1b\u5c11I\/O\u64cd\u4f5c<\/h3>\n<p>hash\u5206\u5340\u80fd\u5920\u6e1b\u5c11\u67e5\u8a62\u6642\u7684I\/O\u64cd\u4f5c\u3002\u7576\u67e5\u8a62\u6d89\u53ca\u5230\u5206\u6790\u51fd\u6578\u6642\uff0c\u6578\u64da\u5eab\u53ea\u9700\u8a2a\u554f\u76f8\u95dc\u7684\u5206\u5340\uff0c\u800c\u4e0d\u662f\u6574\u500b\u8868\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u964d\u4f4e\u78c1\u789f\u8b80\u53d6\u7684\u8ca0\u64d4\u3002<\/p>\n<h3 id=\"3-%e6%8f%90%e9%ab%98%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%8f%af%e6%93%b4%e5%b1%95%e6%80%a7-IyRRMEhNFx\">3. \u63d0\u9ad8\u67e5\u8a62\u7684\u53ef\u64f4\u5c55\u6027<\/h3>\n<p>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0chash\u5206\u5340\u80fd\u5920\u8f15\u9b06\u5730\u64f4\u5c55\u3002\u7528\u6236\u53ef\u4ee5\u6839\u64da\u9700\u8981\u589e\u52a0\u65b0\u7684\u5206\u5340\uff0c\u800c\u4e0d\u6703\u5f71\u97ff\u73fe\u6709\u7684\u67e5\u8a62\u6027\u80fd\u3002\u9019\u5c0d\u65bc\u9700\u8981\u8655\u7406\u4e0d\u65b7\u589e\u9577\u7684\u6578\u64da\u96c6\u7684\u61c9\u7528\u7a0b\u5e8f\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e7%a4%ba%e4%be%8b-IyRRMEhNFx\">\u5be6\u969b\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528hash\u5206\u5340\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE sales (\n    sale_id NUMBER,\n    product_id NUMBER,\n    amount NUMBER,\n    sale_date DATE\n)\nPARTITION BY HASH (product_id)\nPARTITIONS 4;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0csales\u8868\u6839\u64daproduct_id\u9032\u884chash\u5206\u5340\uff0c\u4e26\u5275\u5efa\u4e864\u500b\u5206\u5340\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u53ef\u4ee5\u5728\u9032\u884c\u5206\u6790\u51fd\u6578\u67e5\u8a62\u6642\uff0c\u5145\u5206\u5229\u7528\u591a\u500b\u5206\u5340\u7684\u4e26\u884c\u8655\u7406\u80fd\u529b\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-IyRRMEhNFx\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0chash\u5206\u5340\u5728Oracle\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6280\u8853\uff0c\u80fd\u5920\u986f\u8457\u512a\u5316\u5206\u6790\u51fd\u6578\u67e5\u8a62\u7684\u6027\u80fd\u3002\u901a\u904e\u63d0\u9ad8\u4e26\u884c\u8655\u7406\u80fd\u529b\u3001\u6e1b\u5c11I\/O\u64cd\u4f5c\u4ee5\u53ca\u63d0\u9ad8\u67e5\u8a62\u7684\u53ef\u64f4\u5c55\u6027\uff0chash\u5206\u5340\u70ba\u8655\u7406\u5927\u6578\u64da\u96c6\u63d0\u4f9b\u4e86\u5f37\u6709\u529b\u7684\u652f\u6301\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u67e5\u8a62\u6027\u80fd\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u8003\u616e\u4f7f\u7528hash\u5206\u5340\u5c07\u662f\u4e00\u500b\u660e\u667a\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u53ca\u5176\u4ed6<code>\u4e91\u670d\u52a1\u5668<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u4f7f\u7528\u54c8\u5e0c\u5206\u5340\u6280\u8853\u512a\u5316\u5206\u6790\u51fd\u6578\u67e5\u8a62\u7684\u7b56\u7565\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\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-95368","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95368","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=95368"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95368\/revisions"}],"predecessor-version":[{"id":95369,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95368\/revisions\/95369"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}