在SQL Server Compact 3.5上使用CTE

這是我在stackoverflow上的第一篇文章，我希望是其中之一！在SQL Server Compact 3.5上使用CTE

我的問題是這樣的：我在查詢中使用CTE來檢測並刪除表中的重複記錄。此查詢在SQL Server 2005/2008中工作得很好，但在Compact中引發異常：

解析查詢時出錯。 [令牌行號= 1，抵消令牌線 = 1，令牌錯誤= WITH]

這是我的查詢：

SqlCeConnection con = new SqlCeConnection(ConfigurationManager.ConnectionStrings["ADSLConnectionString"].ConnectionString); 
       SqlCeCommand command = new SqlCeCommand(); 

       command.Connection = con; 
       command.CommandType = CommandType.Text; 

       command.CommandText = "WITH Dublicates_CTE(Username, accountid)" + 
             " AS" + 
             " (" + 
             "  SELECT UserName,min(accountid)" + 
             "  FROM Accounts" + 
             "  GROUP BY username" + 
             "  HAVING Count(*) > 1" + 
             ")" + 
             "  DELETE FROM Accounts" + 
             "  WHERE accountid IN (" + 
             "   SELECT Accounts.accountid" + 
             "   FROM Accounts" + 
             "   INNER JOIN Dublicates_CTE" + 
             "   ON Accounts.Username = Dublicates_CTE.Username" + 
             "   AND Accounts.accountid <> Dublicates_CTE.accountid" + 
             ") "; 

       con.Open(); 

       command.ExecuteNonQuery();

我缺少的東西，還是CTE不行的SQL Server Compact？

來源

2009-06-29 FaNIX

你可能只窩查詢，這樣的事情（可能有一些語法問題）：

DELETE FROM Accounts 
WHERE accountid IN (
    SELECT Accounts.accountid 
    FROM Accounts 
    INNER JOIN (
     SELECT UserName,min(accountid) accountid 
     FROM Accounts 
     GROUP BY username 
     HAVING Count(*) > 1 
    ) Dublicates_CTE 
    ON Accounts.Username = Dublicates_CTE.Username 
    AND Accounts.accountid <> Dublicates_CTE.accountid 
)

來源

2009-06-29 13:13:21 Lucero