选择问题更新

Question

我无法将getdate（）分配给TT.EFFECTIVE_EDATE？

UPDATE
[XXXXX]
 SET
TT.EFFECTIVE_EDATE = getdate(),
TT.CURRENT_FLAG = 'N' 
FROM
[XXXXX] AS TT
INNER JOIN [YYYYY] AS TB
    ON TT.A = TB.A
    AND TT.B = TB.B
WHERE
substring(TB.F,13,8) > substring(TT.F,13,8) 

在运行时，我收到以下错误：

多部分标识符＆＃34; TT.EFFECTIVE_EDATE＆＃34;无法受约束。

Answer 1

试试这个：

UPDATE 
   TT
SET
   EFFECTIVE_EDATE = getdate(),
   CURRENT_FLAG = 'N' 
FROM
   [XXXXX] AS TT
INNER JOIN [YYYYY] AS TB
   ON TT.A = TB.A
      AND TT.B = TB.B
WHERE
   substring(TB.F,13,8) > substring(TT.F,13,8)

Answer 2

您应该在update语句中使用您为此表提供的别名，请尝试以下操作：

UPDATE TT
 SET
TT.EFFECTIVE_EDATE = getdate(),
TT.CURRENT_FLAG = 'N' 
FROM
[XXXXX] AS TT
INNER JOIN [YYYYY] AS TB
    ON TT.A = TB.A
    AND TT.B = TB.B
WHERE
    substring(TB.F,13,8) > substring(TT.F,13,8)