{"id":59587,"date":"2024-10-12T23:13:14","date_gmt":"2024-10-12T15:13:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/59587\/"},"modified":"2024-10-12T23:13:14","modified_gmt":"2024-10-12T15:13:14","slug":"citus-%e5%88%86%e4%bd%88%e5%bc%8f-postgresql-%e9%9b%86%e7%be%a4-sql-reference%e6%94%9d%e5%8f%96%e3%80%81%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a-dml","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/59587\/","title":{"rendered":"Citus \u5206\u4f48\u5f0f PostgreSQL \u96c6\u7fa4 &#8211; SQL Reference(\u651d\u53d6\u3001\u4fee\u6539\u6578\u64da DML)"},"content":{"rendered":"<h1 id=\"citus-%e5%88%86%e4%bd%88%e5%bc%8f-postgresql-%e9%9b%86%e7%be%a4-sql-reference%e6%94%9d%e5%8f%96%e3%80%81%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a-dml-zefXZEMEMV\">Citus \u5206\u4f48\u5f0f PostgreSQL \u96c6\u7fa4 &#8211; SQL Reference(\u651d\u53d6\u3001\u4fee\u6539\u6578\u64da DML)<\/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 DML\uff08\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff09\u529f\u80fd\uff0c\u7279\u5225\u662f\u5982\u4f55\u9032\u884c\u6578\u64da\u7684\u651d\u53d6\u548c\u4fee\u6539\u3002<\/p>\n<h2 id=\"citus-%e7%9a%84%e6%9e%b6%e6%a7%8b%e6%a6%82%e8%bf%b0-zefXZEMEMV\">Citus \u7684\u67b6\u69cb\u6982\u8ff0<\/h2>\n<p>Citus \u5c07 PostgreSQL \u7684\u529f\u80fd\u64f4\u5c55\u5230\u5206\u4f48\u5f0f\u74b0\u5883\u4e2d\uff0c\u901a\u904e\u5c07\u6578\u64da\u5206\u7247\uff08sharding\uff09\u4f86\u5be6\u73fe\u6c34\u5e73\u64f4\u5c55\u3002\u9019\u610f\u5473\u8457\u6578\u64da\u53ef\u4ee5\u5206\u4f48\u5728\u591a\u500b\u7bc0\u9ede\u4e0a\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002Citus \u7684\u67b6\u69cb\u4e3b\u8981\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>Coordinator Node\uff1a<\/strong>\u8ca0\u8cac\u63a5\u6536\u5ba2\u6236\u7aef\u8acb\u6c42\uff0c\u4e26\u5c07\u8acb\u6c42\u5206\u767c\u5230\u76f8\u61c9\u7684\u5de5\u4f5c\u7bc0\u9ede\u3002<\/li>\n<li><strong>Worker Nodes\uff1a<\/strong>\u5be6\u969b\u5b58\u5132\u6578\u64da\u4e26\u57f7\u884c\u67e5\u8a62\u7684\u7bc0\u9ede\u3002<\/li>\n<li><strong>Shards\uff1a<\/strong>\u6578\u64da\u7684\u5206\u7247\uff0c\u6bcf\u500b\u5206\u7247\u53ef\u4ee5\u5b58\u5132\u5728\u4e0d\u540c\u7684\u5de5\u4f5c\u7bc0\u9ede\u4e0a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e6%94%9d%e5%8f%96%ef%bc%88insert%ef%bc%89-zefXZEMEMV\">\u6578\u64da\u651d\u53d6\uff08INSERT\uff09<\/h2>\n<p>\u5728 Citus \u4e2d\uff0c\u6578\u64da\u7684\u651d\u53d6\u4e3b\u8981\u901a\u904e SQL \u7684 INSERT \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684 INSERT \u8a9e\u6cd5\uff1a<\/p>\n<pre><code>INSERT INTO table_name (column1, column2, column3)\nVALUES (value1, value2, value3);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>orders<\/code> \u7684\u8868\uff0c\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE orders (\n    order_id SERIAL PRIMARY KEY,\n    customer_id INT,\n    order_date TIMESTAMP,\n    amount DECIMAL\n);<\/code><\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u5c07\u4e00\u7b46\u65b0\u8a02\u55ae\u63d2\u5165\u5230 <code>orders<\/code> \u8868\u4e2d\uff1a<\/p>\n<pre><code>INSERT INTO orders (customer_id, order_date, amount)\nVALUES (1, NOW(), 100.00);<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e4%bf%ae%e6%94%b9%ef%bc%88update%ef%bc%89-zefXZEMEMV\">\u6578\u64da\u4fee\u6539\uff08UPDATE\uff09<\/h2>\n<p>\u5728 Citus \u4e2d\uff0c\u6578\u64da\u7684\u4fee\u6539\u53ef\u4ee5\u901a\u904e SQL \u7684 UPDATE \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002UPDATE \u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE table_name\nSET column1 = value1, column2 = value2\nWHERE condition;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u66f4\u65b0 <code>orders<\/code> \u8868\u4e2d\u67d0\u500b\u8a02\u55ae\u7684\u91d1\u984d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE orders\nSET amount = 120.00\nWHERE order_id = 1;<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%88%aa%e9%99%a4%ef%bc%88delete%ef%bc%89-zefXZEMEMV\">\u6578\u64da\u522a\u9664\uff08DELETE\uff09<\/h2>\n<p>\u522a\u9664\u6578\u64da\u540c\u6a23\u53ef\u4ee5\u901a\u904e SQL \u7684 DELETE \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002DELETE \u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELETE FROM table_name\nWHERE condition;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664 <code>orders<\/code> \u8868\u4e2d\u67d0\u500b\u7279\u5b9a\u7684\u8a02\u55ae\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DELETE FROM orders\nWHERE order_id = 1;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-zefXZEMEMV\">\u7d50\u8ad6<\/h2>\n<p>Citus \u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u5206\u4f48\u5f0f PostgreSQL \u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684 DML \u64cd\u4f5c\uff0c\u8b93\u7528\u6236\u80fd\u5920\u8f15\u9b06\u5730\u651d\u53d6\u3001\u4fee\u6539\u548c\u522a\u9664\u6578\u64da\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0cCitus \u7684\u5206\u4f48\u5f0f\u67b6\u69cb\u80fd\u5920\u6709\u6548\u5730\u652f\u6301\u4f01\u696d\u7684\u9700\u6c42\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u9ad8\u53ef\u7528\u6027\u548c\u6027\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u5176\u4ed6\u96f2\u670d\u52d9\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Citus \u5206\u4f48\u5f0f PostgreSQL \u96c6\u7fa4\u7684 SQL \u53c3\u8003\uff0c\u4e86\u89e3\u5982\u4f55\u651d\u53d6\u548c\u4fee\u6539\u6578\u64da DML\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-59587","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59587","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=59587"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59587\/revisions"}],"predecessor-version":[{"id":59588,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59587\/revisions\/59588"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=59587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=59587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=59587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}