{"id":59589,"date":"2024-10-12T23:14:15","date_gmt":"2024-10-12T15:14:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/59589\/"},"modified":"2024-10-12T23:14:16","modified_gmt":"2024-10-12T15:14:16","slug":"citus-%e5%88%86%e4%bd%88%e5%bc%8f-postgresql-%e9%9b%86%e7%be%a4-sql-reference%e6%9f%a5%e8%a9%a2%e8%99%95%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/59589\/","title":{"rendered":"Citus \u5206\u4f48\u5f0f PostgreSQL \u96c6\u7fa4-SQL Reference(\u67e5\u8a62\u8655\u7406)"},"content":{"rendered":"<h1 id=\"citus-%e5%88%86%e4%bd%88%e5%bc%8f-postgresql-%e9%9b%86%e7%be%a4-sql-reference%e6%9f%a5%e8%a9%a2%e8%99%95%e7%90%86-hyOOCYGoNe\">Citus \u5206\u4f48\u5f0f PostgreSQL \u96c6\u7fa4-SQL Reference(\u67e5\u8a62\u8655\u7406)<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u4f01\u696d\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u9700\u6c42\u65e5\u76ca\u589e\u52a0\u3002Citus \u662f\u4e00\u500b\u57fa\u65bc PostgreSQL \u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u5927\u898f\u6a21\u6578\u64da\u96c6\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Citus \u7684\u67e5\u8a62\u8655\u7406\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684 SQL \u53c3\u8003\u3002<\/p>\n<h2 id=\"citus-%e7%9a%84%e6%9e%b6%e6%a7%8b%e6%a6%82%e8%bf%b0-hyOOCYGoNe\">Citus \u7684\u67b6\u69cb\u6982\u8ff0<\/h2>\n<p>Citus \u5c07 PostgreSQL \u64f4\u5c55\u70ba\u4e00\u500b\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u901a\u904e\u5c07\u6578\u64da\u5206\u7247\u4e26\u5728\u591a\u500b\u7bc0\u9ede\u4e0a\u9032\u884c\u5b58\u5132\u4f86\u5be6\u73fe\u9ad8\u53ef\u64f4\u5c55\u6027\u3002\u9019\u7a2e\u67b6\u69cb\u4f7f\u5f97 Citus \u80fd\u5920\u8655\u7406\u5927\u91cf\u7684\u4e26\u767c\u67e5\u8a62\uff0c\u4e26\u4e14\u80fd\u5920\u5728\u9700\u8981\u6642\u8f15\u9b06\u64f4\u5c55\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e8%99%95%e7%90%86%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-hyOOCYGoNe\">\u67e5\u8a62\u8655\u7406\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728 Citus \u4e2d\uff0c\u67e5\u8a62\u8655\u7406\u7684\u6838\u5fc3\u662f\u5c07\u67e5\u8a62\u5206\u767c\u5230\u4e0d\u540c\u7684\u6578\u64da\u5206\u7247\u4e0a\u3002\u9019\u610f\u5473\u8457\uff0c\u7576\u7528\u6236\u57f7\u884c\u67e5\u8a62\u6642\uff0cCitus \u6703\u81ea\u52d5\u5c07\u67e5\u8a62\u5206\u89e3\u70ba\u591a\u500b\u5b50\u67e5\u8a62\uff0c\u4e26\u5728\u5404\u500b\u7bc0\u9ede\u4e0a\u4e26\u884c\u57f7\u884c\u3002\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e7%9a%84%e9%a1%9e%e5%9e%8b-hyOOCYGoNe\">\u67e5\u8a62\u7684\u985e\u578b<\/h3>\n<ul>\n<li><strong>\u55ae\u7bc0\u9ede\u67e5\u8a62\uff1a<\/strong>\u9019\u985e\u67e5\u8a62\u50c5\u5728\u4e00\u500b\u7bc0\u9ede\u4e0a\u57f7\u884c\uff0c\u901a\u5e38\u7528\u65bc\u5c0f\u578b\u6578\u64da\u96c6\u3002<\/li>\n<li><strong>\u5206\u4f48\u5f0f\u67e5\u8a62\uff1a<\/strong>\u9019\u985e\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u7bc0\u9ede\uff0c\u9069\u7528\u65bc\u5927\u898f\u6a21\u6578\u64da\u96c6\u3002<\/li>\n<li><strong>\u805a\u5408\u67e5\u8a62\uff1a<\/strong>\u9019\u985e\u67e5\u8a62\u7528\u65bc\u8a08\u7b97\u7e3d\u548c\u3001\u5e73\u5747\u503c\u7b49\u7d71\u8a08\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<h2 id=\"sql-%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-hyOOCYGoNe\">SQL \u67e5\u8a62\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684 SQL \u67e5\u8a62\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5728 Citus \u4e2d\u9032\u884c\u67e5\u8a62\u8655\u7406\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e5%88%86%e7%89%87%e8%a1%a8-hyOOCYGoNe\">1. \u5275\u5efa\u5206\u7247\u8868<\/h3>\n<pre><code>CREATE TABLE orders (\n    order_id SERIAL PRIMARY KEY,\n    customer_id INT,\n    order_date TIMESTAMP,\n    amount DECIMAL\n);\n\nSELECT create_distributed_table('orders', 'customer_id');<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u78bc\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba orders \u7684\u8868\uff0c\u4e26\u6839\u64da customer_id \u5c0d\u5176\u9032\u884c\u5206\u7247\u3002<\/p>\n<h3 id=\"2-%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-hyOOCYGoNe\">2. \u63d2\u5165\u6578\u64da<\/h3>\n<pre><code>INSERT INTO orders (customer_id, order_date, amount) VALUES\n(1, '2023-01-01', 100.00),\n(2, '2023-01-02', 150.00),\n(1, '2023-01-03', 200.00);<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5411 orders \u8868\u4e2d\u63d2\u5165\u4e86\u5e7e\u689d\u8a18\u9304\u3002<\/p>\n<h3 id=\"3-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-hyOOCYGoNe\">3. \u67e5\u8a62\u6578\u64da<\/h3>\n<pre><code>SELECT customer_id, SUM(amount) AS total_amount\nFROM orders\nGROUP BY customer_id;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u5ba2\u6236\u7684\u7e3d\u8a02\u55ae\u91d1\u984d\uff0c\u5c55\u793a\u4e86 Citus \u5728\u8655\u7406\u805a\u5408\u67e5\u8a62\u6642\u7684\u80fd\u529b\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96%e6%8a%80%e5%b7%a7-hyOOCYGoNe\">\u67e5\u8a62\u512a\u5316\u6280\u5de7<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8 Citus \u4e2d\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u6280\u5de7\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9069\u7576\u7684\u7d22\u5f15\uff1a<\/strong>\u70ba\u5e38\u7528\u7684\u67e5\u8a62\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\uff0c\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li><strong>\u907f\u514d\u4e0d\u5fc5\u8981\u7684 JOIN \u64cd\u4f5c\uff1a<\/strong>\u5728\u53ef\u80fd\u7684\u60c5\u6cc1\u4e0b\uff0c\u76e1\u91cf\u6e1b\u5c11 JOIN \u7684\u4f7f\u7528\uff0c\u56e0\u70ba\u9019\u6703\u589e\u52a0\u67e5\u8a62\u7684\u8907\u96dc\u6027\u3002<\/li>\n<li><strong>\u5229\u7528\u5206\u7247\u9375\uff1a<\/strong>\u9078\u64c7\u5408\u9069\u7684\u5206\u7247\u9375\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\uff0c\u56e0\u70ba\u5b83\u80fd\u5920\u6e1b\u5c11\u9700\u8981\u6383\u63cf\u7684\u6578\u64da\u91cf\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hyOOCYGoNe\">\u7e3d\u7d50<\/h2>\n<p>Citus \u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u5206\u4f48\u5f0f PostgreSQL \u89e3\u6c7a\u65b9\u6848\uff0c\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u5927\u898f\u6a21\u6578\u64da\u96c6\u7684\u67e5\u8a62\u9700\u6c42\u3002\u901a\u904e\u5408\u7406\u7684\u67e5\u8a62\u8a2d\u8a08\u548c\u512a\u5316\uff0c\u4f01\u696d\u53ef\u4ee5\u5145\u5206\u767c\u63ee Citus \u7684\u6027\u80fd\u6f5b\u529b\u3002\u82e5\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u9999\u6e2f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">VPS<\/a> \u4f86\u90e8\u7f72 Citus \u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Citus \u5206\u4f48\u5f0f PostgreSQL \u96c6\u7fa4\u7684 SQL \u53c3\u8003\uff0c\u6df1\u5165\u4e86\u89e3\u67e5\u8a62\u8655\u7406\u7684\u6700\u4f73\u5be6\u8e10\u8207\u6280\u8853\u7d30\u7bc0\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-59589","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59589","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=59589"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59589\/revisions"}],"predecessor-version":[{"id":59590,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59589\/revisions\/59590"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=59589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=59589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=59589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}