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把子查询所得到的列作为运算列,该如何解决

2012-05-28 
把子查询所得到的列作为运算列SQL codeSELECT PID,SaleOrderID,MaterialID,NewOrderNum,OldOrderNum,OldBu

把子查询所得到的列作为运算列

SQL code
SELECT PID,SaleOrderID,MaterialID,NewOrderNum,OldOrderNum,OldBuyIn  FROM st_NeedBuyIn AS AWHERE EXISTS(    SELECT MaterialID,Number     FROM HtSaleProductDetail AS B    WHERE SaleProductID=(        SELECT AlreadySaleProduct FROM HtSaleOrder WHERE PID=24                 )     AND A.MaterialID=B.MaterialID)

我想把别名B表中的Number,作为别名A表中的运算列,也就是OldBuyIn=OldBuyIn * B.Number,能否实现,请各位指点,谢谢!

[解决办法]
SQL code
SELECT PID,SaleOrderID,MaterialID,NewOrderNum,OldOrderNum,(OldBuyIn*B.Number) OldBuyIn  FROM st_NeedBuyIn AS Ajoin HtSaleProductDetail AS B on A.MaterialID=B.MaterialIDjoin (SELECT AlreadySaleProduct FROM HtSaleOrder WHERE PID=24) as C ON B.SaleProductID=C.AlreadySaleProduct 

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