sql-server - SQL Server 使用一个查询的结果并在另一个查询中使用它。

Question

我对 sql 很陌生。

我想要以下内容：

SELECT transID from tblTrans WHERE transDesc = @TransDesc

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

如何将第一个查询的结果放入第二个查询。

Answer 1

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

Answer 2

有两种方法可以做到这一点。第一个遵循您的原件，并假设只有一个 transID：

DECLARE @transID int

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

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

第二个更简洁，因为它将整个更新放入一个命令中：

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

Answer 3

尝试这个...

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

Answer 4

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