{"id":175441,"date":"2024-11-08T05:54:16","date_gmt":"2024-11-07T21:54:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175441\/"},"modified":"2024-11-08T05:54:17","modified_gmt":"2024-11-07T21:54:17","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8vb%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%ef%bc%88vb%e5%88%aa%e9%99%a4%e9%87%8d%e8%a4%87%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175441\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528VB\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\uff08vb\u522a\u9664\u91cd\u8907\u7684\u6578\u64da\u5eab\uff09"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8vb%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%ef%bc%88vb%e5%88%aa%e9%99%a4%e9%87%8d%e8%a4%87%e7%9a%84-TNhVyaHFme\">\u5982\u4f55\u4f7f\u7528VB\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\uff08vb\u522a\u9664\u91cd\u8907\u7684\u6578\u64da\u5eab\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u91cd\u8907\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u9019\u4e0d\u50c5\u6703\u5f71\u97ff\u6578\u64da\u7684\u6e96\u78ba\u6027\uff0c\u9084\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u4f7f\u7528Visual Basic\uff08VB\uff09\u4f86\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\u662f\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528VB\u4f86\u8b58\u5225\u548c\u522a\u9664\u91cd\u8907\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%e7%9a%84%e5%ae%9a%e7%be%a9-TNhVyaHFme\">\u91cd\u8907\u6578\u64da\u7684\u5b9a\u7fa9<\/h2>\n<p>\u91cd\u8907\u6578\u64da\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5728\u591a\u689d\u76f8\u540c\u6216\u76f8\u4f3c\u7684\u8a18\u9304\u3002\u9019\u4e9b\u91cd\u8907\u7684\u8a18\u9304\u53ef\u80fd\u662f\u7531\u65bc\u591a\u6b21\u8f38\u5165\u76f8\u540c\u6578\u64da\u3001\u6578\u64da\u5c0e\u5165\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\u6216\u5176\u4ed6\u539f\u56e0\u9020\u6210\u7684\u3002\u91cd\u8907\u6578\u64da\u4e0d\u50c5\u6d6a\u8cbb\u5b58\u5132\u7a7a\u9593\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u67e5\u8a62\u7d50\u679c\u7684\u4e0d\u6e96\u78ba\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8vb%e5%88%aa%e9%99%a4%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%e7%9a%84%e6%ad%a5%e9%a9%9f-TNhVyaHFme\">\u4f7f\u7528VB\u522a\u9664\u91cd\u8907\u6578\u64da\u7684\u6b65\u9a5f<\/h2>\n<h3 id=\"1-%e9%80%a3%e6%8e%a5%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab-TNhVyaHFme\">1. \u9023\u63a5\u5230\u6578\u64da\u5eab<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u4f7f\u7528VB\u9023\u63a5\u5230\u60a8\u7684\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528ADO.NET\u4f86\u9023\u63a5\u5230SQL Server\u6578\u64da\u5eab\uff1a<\/p>\n<pre><code>\nDim connectionString As String = \"Data Source=your_server;Initial Catalog=your_database;User ID=your_username;Password=your_password;\"\nDim connection As New SqlConnection(connectionString)\nconnection.Open()\n<\/code><\/pre>\n<h3 id=\"2-%e6%9f%a5%e6%89%be%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a-TNhVyaHFme\">2. \u67e5\u627e\u91cd\u8907\u6578\u64da<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u60a8\u9700\u8981\u67e5\u627e\u91cd\u8907\u7684\u8a18\u9304\u3002\u53ef\u4ee5\u4f7f\u7528SQL\u67e5\u8a62\u4f86\u8b58\u5225\u91cd\u8907\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u60a8\u6709\u4e00\u500b\u540d\u70ba\u201cCustomers\u201d\u7684\u8868\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u627e\u91cd\u8907\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff1a<\/p>\n<pre><code>\nDim query As String = \"SELECT Email, COUNT(*) as Count FROM Customers GROUP BY Email HAVING COUNT(*) &gt; 1\"\nDim command As New SqlCommand(query, connection)\nDim reader As SqlDataReader = command.ExecuteReader()\n<\/code><\/pre>\n<h3 id=\"3-%e5%88%aa%e9%99%a4%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a-TNhVyaHFme\">3. \u522a\u9664\u91cd\u8907\u6578\u64da<\/h3>\n<p>\u4e00\u65e6\u8b58\u5225\u51fa\u91cd\u8907\u7684\u8a18\u9304\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u53e6\u4e00\u500bSQL\u67e5\u8a62\u4f86\u522a\u9664\u9019\u4e9b\u91cd\u8907\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u522a\u9664\u91cd\u8907\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff0c\u53ea\u4fdd\u7559\u4e00\u689d\u8a18\u9304\uff1a<\/p>\n<pre><code>\nDim deleteQuery As String = \"WITH CTE AS (SELECT *, ROW_NUMBER() OVER (PARTITION BY Email ORDER BY Id) AS RowNum FROM Customers) DELETE FROM CTE WHERE RowNum &gt; 1\"\nDim deleteCommand As New SqlCommand(deleteQuery, connection)\ndeleteCommand.ExecuteNonQuery()\n<\/code><\/pre>\n<h3 id=\"4-%e9%97%9c%e9%96%89%e9%80%a3%e6%8e%a5-TNhVyaHFme\">4. \u95dc\u9589\u9023\u63a5<\/h3>\n<p>\u6700\u5f8c\uff0c\u8a18\u5f97\u5728\u64cd\u4f5c\u5b8c\u6210\u5f8c\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\uff1a<\/p>\n<pre><code>\nconnection.Close()\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-TNhVyaHFme\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u522a\u9664\u6578\u64da\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u522a\u9664\u91cd\u8981\u6578\u64da\u3002<\/li>\n<li>\u5728\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u6642\uff0c\u8acb\u78ba\u4fdd\u60a8\u7684\u67e5\u8a62\u6b63\u78ba\u7121\u8aa4\uff0c\u4ee5\u907f\u514d\u522a\u9664\u932f\u8aa4\u7684\u8a18\u9304\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-TNhVyaHFme\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528VB\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\u662f\u4e00\u500b\u6709\u6548\u7684\u7ba1\u7406\u65b9\u6cd5\u3002\u901a\u904e\u9023\u63a5\u6578\u64da\u5eab\u3001\u67e5\u627e\u91cd\u8907\u8a18\u9304\u4ee5\u53ca\u57f7\u884c\u522a\u9664\u64cd\u4f5c\uff0c\u60a8\u53ef\u4ee5\u4fdd\u6301\u6578\u64da\u7684\u6574\u6f54\u548c\u6e96\u78ba\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528VB\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u91cd\u8907\u6578\u64da\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\uff0c\u63d0\u5347\u6578\u64da\u6e96\u78ba\u6027\u548c\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-175441","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175441","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=175441"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175441\/revisions"}],"predecessor-version":[{"id":175442,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175441\/revisions\/175442"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175441"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}