SQL Server使用來自一個查詢的結果並在另一個查詢中使用它。

Question

我很新的SQL。

我想以下幾點：

SELECT transID from tblTrans WHERE transDesc = @TransDesc 

UPDATE tblData SET Complete = GETDATE() WHERE transNo = (Result from First Query) 

我如何把第一次查詢的結果到第二個查詢。

Answer 1

UPDATE tblData SET Complete = GETDATE() WHERE transNo IN (SELECT transID from tblTrans WHERE transDesc = @TransDesc) 

Answer 2

嘗試......

UPDATE tblData SET Complete = GETDATE() 
    WHERE transNo IN (SELECT transID from tblTrans WHERE transDesc = @TransDesc); 

Answer 3

UPDATE tblData 
SET Complete = GETDATE() 
WHERE transNo IN 
    (SELECT transID 
    from tblTrans 
    WHERE transDesc = @TransDesc) 

Answer 4

這樣做有兩種方式。首先遵循原來的，並假定只有一個TRANSID：

DECLARE @transID int 

SELECT @transID = transID from tblTrans WHERE transDesc = @TransDesc 

UPDATE tblData SET Complete = GETDATE() WHERE transNo = @transID 

第二是整潔的，因爲它把整個更新成一個單一的命令：

UPDATE tblData SET Complete = GETDATE() 
    FROM tblTrans t 
    WHERE t.transID = tblData.transNo 
     AND t.transDesc = @TransDesc