{"id":158163,"date":"2024-11-03T00:31:38","date_gmt":"2024-11-02T16:31:38","guid":{"rendered":"https:\/\/server.hk\/cnblog\/158163\/"},"modified":"2024-11-03T00:31:38","modified_gmt":"2024-11-02T16:31:38","slug":"%e9%ab%98%e6%95%88%e8%a7%a3%e6%b1%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%e5%95%8f%e9%a1%8c%ef%bc%88%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/158163\/","title":{"rendered":"\u9ad8\u6548\u89e3\u6c7a\u6578\u64da\u5eab\u5197\u9918\u554f\u984c\uff08\u5982\u4f55\u8655\u7406\u6578\u64da\u5eab\u5197\u9918\uff09"},"content":{"rendered":"<h1 id=\"%e9%ab%98%e6%95%88%e8%a7%a3%e6%b1%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%e5%95%8f%e9%a1%8c%ef%bc%88%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%ef%bc%89-rByrUVZYWo\">\u9ad8\u6548\u89e3\u6c7a\u6578\u64da\u5eab\u5197\u9918\u554f\u984c\uff08\u5982\u4f55\u8655\u7406\u6578\u64da\u5eab\u5197\u9918\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u512a\u5316\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u6578\u64da\u5eab\u5197\u9918\u554f\u984c\u662f\u8a31\u591a\u4f01\u696d\u5728\u6578\u64da\u7ba1\u7406\u904e\u7a0b\u4e2d\u9762\u81e8\u7684\u4e00\u500b\u6311\u6230\u3002\u5197\u9918\u6578\u64da\u4e0d\u50c5\u4f54\u7528\u5b58\u5132\u7a7a\u9593\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6027\uff0c\u5f71\u97ff\u7cfb\u7d71\u6027\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u5197\u9918\u7684\u539f\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u9ad8\u6548\u89e3\u6c7a\u5197\u9918\u554f\u984c\u7684\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%ef%bc%9f-rByrUVZYWo\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u5197\u9918\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u5197\u9918\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u91cd\u8907\u5b58\u5132\u76f8\u540c\u7684\u6578\u64da\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e0d\u7576\u6216\u6578\u64da\u66f4\u65b0\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u4e0b\u3002\u5197\u9918\u6578\u64da\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6027\uff0c\u56e0\u70ba\u4e0d\u540c\u7684\u6578\u64da\u526f\u672c\u53ef\u80fd\u6703\u88ab\u4e0d\u540c\u7684\u7528\u6236\u6216\u61c9\u7528\u7a0b\u5e8f\u4fee\u6539\uff0c\u5f9e\u800c\u7522\u751f\u77db\u76fe\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%e7%9a%84%e5%8e%9f%e5%9b%a0-rByrUVZYWo\">\u6578\u64da\u5eab\u5197\u9918\u7684\u539f\u56e0<\/h2>\n<ul>\n<li><strong>\u8a2d\u8a08\u4e0d\u7576\uff1a<\/strong>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u968e\u6bb5\uff0c\u5982\u679c\u6c92\u6709\u9075\u5faa\u6b63\u898f\u5316\u539f\u5247\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5197\u9918\u6578\u64da\u7684\u7522\u751f\u3002<\/li>\n<li><strong>\u6578\u64da\u66f4\u65b0\u4e0d\u4e00\u81f4\uff1a<\/strong>\u7576\u6578\u64da\u5728\u591a\u500b\u5730\u65b9\u88ab\u66f4\u65b0\u6642\uff0c\u5982\u679c\u6c92\u6709\u9069\u7576\u7684\u540c\u6b65\u6a5f\u5236\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5197\u9918\u3002<\/li>\n<li><strong>\u696d\u52d9\u9700\u6c42\u8b8a\u5316\uff1a<\/strong>\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u53ef\u80fd\u9700\u8981\u5728\u6578\u64da\u5eab\u4e2d\u6dfb\u52a0\u65b0\u7684\u5b57\u6bb5\u6216\u8868\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u5197\u9918\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98%e7%9a%84%e5%bd%b1%e9%9f%bf-rByrUVZYWo\">\u6578\u64da\u5eab\u5197\u9918\u7684\u5f71\u97ff<\/h2>\n<p>\u6578\u64da\u5eab\u5197\u9918\u6703\u5c0d\u7cfb\u7d71\u6027\u80fd\u548c\u6578\u64da\u5b8c\u6574\u6027\u7522\u751f\u8ca0\u9762\u5f71\u97ff\u3002\u5177\u9ad4\u5f71\u97ff\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u5b58\u5132\u7a7a\u9593\u6d6a\u8cbb\uff1a<\/strong>\u5197\u9918\u6578\u64da\u4f54\u7528\u984d\u5916\u7684\u5b58\u5132\u7a7a\u9593\uff0c\u589e\u52a0\u4e86\u5b58\u5132\u6210\u672c\u3002<\/li>\n<li><strong>\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\uff1a<\/strong>\u67e5\u8a62\u5197\u9918\u6578\u64da\u9700\u8981\u66f4\u591a\u7684\u8a08\u7b97\u8cc7\u6e90\uff0c\u5f9e\u800c\u964d\u4f4e\u4e86\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u6578\u64da\u4e0d\u4e00\u81f4\u6027\uff1a<\/strong>\u4e0d\u540c\u7684\u6578\u64da\u526f\u672c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\uff0c\u5f71\u97ff\u6c7a\u7b56\u7684\u6e96\u78ba\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%97%e9%a4%98-rByrUVZYWo\">\u5982\u4f55\u8655\u7406\u6578\u64da\u5eab\u5197\u9918<\/h2>\n<h3 id=\"1-%e6%ad%a3%e8%a6%8f%e5%8c%96%e6%95%b8%e6%93%9a%e5%ba%ab-rByrUVZYWo\">1. \u6b63\u898f\u5316\u6578\u64da\u5eab<\/h3>\n<p>\u6b63\u898f\u5316\u662f\u6d88\u9664\u6578\u64da\u5197\u9918\u7684\u6709\u6548\u65b9\u6cd5\u3002\u901a\u904e\u5c07\u6578\u64da\u5206\u89e3\u70ba\u591a\u500b\u8868\uff0c\u4e26\u4f7f\u7528\u5916\u9375\u4f86\u5efa\u7acb\u8868\u4e4b\u9593\u7684\u95dc\u4fc2\uff0c\u53ef\u4ee5\u6e1b\u5c11\u5197\u9918\u3002\u4f8b\u5982\uff0c\u5c07\u5ba2\u6236\u4fe1\u606f\u548c\u8a02\u55ae\u4fe1\u606f\u5206\u958b\u5b58\u5132\uff0c\u4e26\u901a\u904e\u5ba2\u6236ID\u9032\u884c\u95dc\u806f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u5197\u9918\u3002<\/p>\n<pre><code>CREATE TABLE Customers (\n    CustomerID INT PRIMARY KEY,\n    CustomerName VARCHAR(100)\n);\n\nCREATE TABLE Orders (\n    OrderID INT PRIMARY KEY,\n    CustomerID INT,\n    OrderDate DATE,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)\n);<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e5%94%af%e4%b8%80%e7%b4%84%e6%9d%9f-rByrUVZYWo\">2. \u4f7f\u7528\u552f\u4e00\u7d04\u675f<\/h3>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u8a2d\u7f6e\u552f\u4e00\u7d04\u675f\u53ef\u4ee5\u9632\u6b62\u91cd\u8907\u6578\u64da\u7684\u63d2\u5165\u3002\u4f8b\u5982\uff0c\u5728\u7528\u6236\u8868\u4e2d\u8a2d\u7f6e\u96fb\u5b50\u90f5\u4ef6\u5b57\u6bb5\u70ba\u552f\u4e00\uff0c\u53ef\u4ee5\u907f\u514d\u91cd\u8907\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT PRIMARY KEY,\n    Email VARCHAR(100) UNIQUE\n);<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e6%b8%85%e7%90%86%e6%95%b8%e6%93%9a-rByrUVZYWo\">3. \u5b9a\u671f\u6e05\u7406\u6578\u64da<\/h3>\n<p>\u5b9a\u671f\u6aa2\u67e5\u548c\u6e05\u7406\u6578\u64da\u5eab\u4e2d\u7684\u5197\u9918\u6578\u64da\u662f\u4fdd\u6301\u6578\u64da\u5eab\u5065\u5eb7\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u53ef\u4ee5\u4f7f\u7528\u67e5\u8a62\u4f86\u8b58\u5225\u548c\u522a\u9664\u91cd\u8907\u7684\u8a18\u9304\u3002<\/p>\n<pre><code>DELETE FROM Orders\nWHERE OrderID NOT IN (\n    SELECT MIN(OrderID)\n    FROM Orders\n    GROUP BY CustomerID, OrderDate\n);<\/code><\/pre>\n<h3 id=\"4-%e5%af%a6%e6%96%bd%e6%95%b8%e6%93%9a%e5%90%8c%e6%ad%a5%e6%a9%9f%e5%88%b6-rByrUVZYWo\">4. \u5be6\u65bd\u6578\u64da\u540c\u6b65\u6a5f\u5236<\/h3>\n<p>\u5982\u679c\u6578\u64da\u5728\u591a\u500b\u7cfb\u7d71\u4e2d\u5b58\u5728\uff0c\u5be6\u65bd\u6578\u64da\u540c\u6b65\u6a5f\u5236\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u5f9e\u800c\u6e1b\u5c11\u5197\u9918\u7684\u53ef\u80fd\u6027\u3002\u53ef\u4ee5\u4f7f\u7528API\u6216ETL\u5de5\u5177\u4f86\u5be6\u73fe\u6578\u64da\u7684\u81ea\u52d5\u540c\u6b65\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rByrUVZYWo\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u5197\u9918\u554f\u984c\u662f\u4f01\u696d\u5728\u6578\u64da\u7ba1\u7406\u4e2d\u5e38\u898b\u7684\u6311\u6230\uff0c\u901a\u904e\u6b63\u898f\u5316\u3001\u4f7f\u7528\u552f\u4e00\u7d04\u675f\u3001\u5b9a\u671f\u6e05\u7406\u6578\u64da\u548c\u5be6\u65bd\u6578\u64da\u540c\u6b65\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u4fdd\u6301\u6578\u64da\u5eab\u7684\u6574\u6f54\u548c\u4e00\u81f4\u6027\u4e0d\u50c5\u80fd\u63d0\u9ad8\u7cfb\u7d71\u6027\u80fd\uff0c\u9084\u80fd\u589e\u5f37\u6c7a\u7b56\u7684\u6e96\u78ba\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5982 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u696d\u52d9\u904b\u71df\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9ad8\u6548\u89e3\u6c7a\u6578\u64da\u5eab\u5197\u9918\u554f\u984c\uff0c\u63a2\u7d22\u6700\u4f73\u5be6\u8e10\u8207\u7b56\u7565\uff0c\u63d0\u5347\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b58\u5132\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\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-158163","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158163","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=158163"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158163\/revisions"}],"predecessor-version":[{"id":158164,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158163\/revisions\/158164"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=158163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=158163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=158163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}