{"id":175415,"date":"2024-11-08T05:41:23","date_gmt":"2024-11-07T21:41:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175415\/"},"modified":"2024-11-08T05:41:24","modified_gmt":"2024-11-07T21:41:24","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e8%a8%aa%e5%95%8f%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%88sql%e8%a8%aa%e5%95%8f%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175415\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\uff08sql\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\uff09"},"content":{"rendered":"<h1 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id=\"%e4%bb%80%e9%ba%bc%e6%98%afsql%ef%bc%9f-LFdeJSCrdG\">\u4ec0\u9ebc\u662fSQL\uff1f<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5b83\u5141\u8a31\u7528\u6236\u5275\u5efa\u3001\u8b80\u53d6\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002SQL\u7684\u5f37\u5927\u4e4b\u8655\u5728\u65bc\u5b83\u7684\u901a\u7528\u6027\uff0c\u5e7e\u4e4e\u6240\u6709\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982MySQL\u3001PostgreSQL\u3001Oracle\u7b49\uff09\u90fd\u652f\u6301SQL\u8a9e\u6cd5\u3002<\/p>\n<h2 id=\"%e8%a8%aa%e5%95%8f%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-LFdeJSCrdG\">\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u5f9e\u4e00\u500b\u6578\u64da\u5eab\u8a2a\u554f\u53e6\u4e00\u500b\u6578\u64da\u5eab\u7684\u6578\u64da\u3002\u9019\u53ef\u4ee5\u901a\u904e\u591a\u7a2e\u65b9\u5f0f\u5be6\u73fe\uff0c\u5177\u9ad4\u53d6\u6c7a\u65bc\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u548c\u914d\u7f6e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5eab\u93c8\u63a5\uff08Database Links\uff09<\/strong>\uff1a\u8a31\u591a\u6578\u64da\u5eab\u7cfb\u7d71\u652f\u6301\u6578\u64da\u5eab\u93c8\u63a5\uff0c\u5141\u8a31\u7528\u6236\u5728\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u53e6\u4e00\u500b\u6578\u64da\u5eab\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u806f\u5408\u67e5\u8a62\uff08Union Queries\uff09<\/strong>\uff1a\u901a\u904e\u806f\u5408\u67e5\u8a62\uff0c\u53ef\u4ee5\u5c07\u4f86\u81ea\u4e0d\u540c\u6578\u64da\u5eab\u7684\u6578\u64da\u5408\u4f75\u5230\u4e00\u500b\u7d50\u679c\u96c6\u4e2d\u3002<\/li>\n<li><strong>ETL\u5de5\u5177\uff08Extract, Transform, Load\uff09<\/strong>\uff1a\u9019\u4e9b\u5de5\u5177\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5f9e\u4e00\u500b\u6578\u64da\u5eab\u63d0\u53d6\u6578\u64da\uff0c\u9032\u884c\u8f49\u63db\uff0c\u7136\u5f8c\u52a0\u8f09\u5230\u53e6\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8f%88%e6%8e%a5%e8%a8%aa%e5%95%8f%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab-LFdeJSCrdG\">\u4f7f\u7528\u6578\u64da\u5eab\u93c8\u63a5\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab<\/h2>\n<p>\u6578\u64da\u5eab\u93c8\u63a5\u662f\u4e00\u7a2e\u65b9\u4fbf\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8b93\u7528\u6236\u5728\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u76f4\u63a5\u67e5\u8a62\u53e6\u4e00\u500b\u6578\u64da\u5eab\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u6578\u64da\u5eab\u93c8\u63a5\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE DATABASE LINK remote_db\n    CONNECT TO remote_user IDENTIFIED BY 'password'\n    USING 'remote_database';\n<\/code><\/pre>\n<p>\u5275\u5efa\u6578\u64da\u5eab\u93c8\u63a5\u5f8c\uff0c\u7528\u6236\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u8a2a\u554f\u9060\u7a0b\u6578\u64da\u5eab\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM remote_table@remote_db;\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%81%af%e5%90%88%e6%9f%a5%e8%a9%a2%e8%a8%aa%e5%95%8f%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab-LFdeJSCrdG\">\u4f7f\u7528\u806f\u5408\u67e5\u8a62\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab<\/h2>\n<p>\u5982\u679c\u5169\u500b\u6578\u64da\u5eab\u5728\u540c\u4e00\u500b\u4f3a\u670d\u5668\u4e0a\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u806f\u5408\u67e5\u8a62\u4f86\u5408\u4f75\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u5169\u500b\u6578\u64da\u5eab\uff1adb1\u548cdb2\uff0c\u4e26\u4e14\u5b83\u5011\u90fd\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u7372\u53d6\u4f86\u81ea\u5169\u500b\u6578\u64da\u5eab\u7684\u7528\u6236\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM db1.users\nUNION\nSELECT * FROM db2.users;\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8etl%e5%b7%a5%e5%85%b7-LFdeJSCrdG\">\u4f7f\u7528ETL\u5de5\u5177<\/h2>\n<p>ETL\u5de5\u5177\u5982Apache Nifi\u3001Talend\u6216Microsoft SQL Server Integration Services\uff08SSIS\uff09\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5f9e\u4e00\u500b\u6578\u64da\u5eab\u63d0\u53d6\u6578\u64da\uff0c\u9032\u884c\u5fc5\u8981\u7684\u8f49\u63db\uff0c\u7136\u5f8c\u5c07\u5176\u52a0\u8f09\u5230\u53e6\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u3002\u9019\u4e9b\u5de5\u5177\u901a\u5e38\u63d0\u4f9b\u5716\u5f62\u5316\u754c\u9762\uff0c\u4f7f\u7528\u6236\u80fd\u5920\u8f15\u9b06\u8a2d\u7f6e\u6578\u64da\u6d41\u548c\u8f49\u63db\u898f\u5247\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-LFdeJSCrdG\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u5b89\u5168\u6027\uff1a\u78ba\u4fdd\u6578\u64da\u5eab\u4e4b\u9593\u7684\u9023\u63a5\u662f\u5b89\u5168\u7684\uff0c\u4e26\u4e14\u4f7f\u7528\u9069\u7576\u7684\u8eab\u4efd\u9a57\u8b49\u6a5f\u5236\u3002<\/li>\n<li>\u6027\u80fd\uff1a\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li>\u517c\u5bb9\u6027\uff1a\u4e0d\u540c\u6578\u64da\u5eab\u7cfb\u7d71\u4e4b\u9593\u7684SQL\u8a9e\u6cd5\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\uff0c\u9700\u6ce8\u610f\u517c\u5bb9\u6027\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LFdeJSCrdG\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528SQL\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u80fd\uff0c\u7121\u8ad6\u662f\u5728\u6578\u64da\u5206\u6790\u9084\u662f\u61c9\u7528\u958b\u767c\u4e2d\u3002\u901a\u904e\u6578\u64da\u5eab\u93c8\u63a5\u3001\u806f\u5408\u67e5\u8a62\u548cETL\u5de5\u5177\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u5730\u5f9e\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u548c\u64cd\u4f5c\u6578\u64da\u3002\u4e86\u89e3\u9019\u4e9b\u6280\u8853\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u548c\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528SQL\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\uff0c\u638c\u63e1\u9023\u63a5\u3001\u67e5\u8a62\u548c\u7ba1\u7406\u6578\u64da\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-175415","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175415","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=175415"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175415\/revisions"}],"predecessor-version":[{"id":175416,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175415\/revisions\/175416"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}