Question

此SQL查询有什么问题？

SELECT id AS Expr 
FROM EXTDATA.Monitoring.dbo.Exceptions 
WHERE EXTDATA.Monitoring.dbo.Exceptions.exceptionID = EXTDATA.Monitoring.dbo.RoomView.exceptionID

当我尝试执行查询时，收到此错误消息：

Msg  4104, Level  ##, State  1, Line 3
The multi-part identifier "EXTDATA.Monitoring.dbo.Exceptions.exceptionID" could not be bound.
Msg  4104, Level  ##, State  1, Line 3
The multi-part identifier "EXTDATA.Monitoring.dbo.RoomView.exceptionID" could not be bound.

RoomView是一个视图，Exceptions是一个表。

Answer 1

加入后似乎是你

SELECT id AS Expr 
FROM EXTDATA.Monitoring.dbo.Exceptions EX
     INNER JOIN EXTDATA.Monitoring.dbo.RoomView RW ON EX.exceptionID = RW.exceptionID

Answer 2

问题是查询的EXTDATA.Monitoring.dbo.RoomView或FROM子句中未提及JOIN视图。您无法在WHERE子句表达式中引用视图或表格：您需要添加EXISTS或JOIN：

SELECT id AS Expr 
FROM EXTDATA.Monitoring.dbo.Exceptions e
WHERE EXISTS (
    SELECT * FROM EXTDATA.Monitoring.dbo.RoomView v
    WHERE e.exceptionID = v.exceptionID
)

或

SELECT DISTINCT id AS Expr
FROM EXTDATA.Monitoring.dbo.Exceptions e
JOIN EXTDATA.Monitoring.dbo.RoomView v ON e.exceptionID = v.exceptionID

无法绑定多部分标识符

2 个答案: