Question

需要根据多组帐户作为条件运行查询。试图避免光标/ while循环场景。 @MasterGroup变量是游标迭代器，直接从Group表派生，Group表是来自Group表的一对多，然后在WHERE子句的子查询中使用。最终结果将使用@MasterGroup整数填充到新表中。有什么方法可以避免在这里使用游标/循环？非常感谢......

Insert Into SAGTranTmp
SELECT 
        @MasterGroup,
        C1.Cust_Type,
        T1.Exclude,
        T1.Acct_No,
        SUM(Tran_Amt) AS [Amount]
FROM dbo.Trans AS [T1]
     JOIN dbo.Customers AS C1 ON T1.Acct_No = C1.Acct_No
WHERE C1.Acct_No IN (
        SELECT AcctNo 
        FROM SignAcc_Group
        WHERE MasterGroup = @MasterGroup)

Answer 1

假设#MasterGroup AS TABLE（MasterGroup int）。你可以试试这个：

;WITH 
temp AS (SELECT DISTINCT
    mg.MasterGroup,
    T1.Acct_No
 FROM dbo.Trans AS [T1]
       Inner JOIN dbo.Customers AS C1 ON T1.Acct_No = C1.Acct_No
       inner join SignAcc_Group as sg ON C1.Acct_No = sg.AcctNo 
       inner join #MasterGroup mg ON sg.MasterGroup  = mg.MasterGroup        
         )
 Insert Into SAGTranTmp
 SELECT 
    t.MasterGroup,
    C1.Cust_Type,
    T1.Exclude,
    T1.Acct_No,
    SUM(Tran_Amt) AS [Amount]
 FROM temp t 
 INNER JOIN dbo.Trans AS [T1] ON T1.Acct_No = t.Acct_No 
 INNER JOIN dbo.Customers AS C1 ON T1.Acct_No = C1.Acct_No
 GROUP BY t.MasterGroup,
       C1.Cust_Type,
       T1.Exclude,
       T1.Acct_No

Answer 2

如果我愿意，我可能会过度简化并道歉，但请尝试这一点并希望它有所帮助。

for..loop

使用基于集合的查询而不是光标

2 个答案: