Question

我正在尝试运行查询，并且在运行以下查询时工作正常：

SELECT 'Delivery' activity_type,
left(pod.ID1, charindex('*', pod.ID1) - 1) load_number,
DATEADD(hour, CONVERT(INT, LEFT(CONVERT(VARCHAR(2), ISNULL(Dock_In_Time, 
'0')), 2)), CONVERT(DATETIME, ID2)) expected_arrival
FROM [Server].[Database].[dbo].[POD_Sched_Del] pod
--WHERE expected_arrival between '6/7/18' and '6/8/18'
ORDER BY expected_arrival asc, activity_type

当我添加注释中的以下代码行时：

--WHERE expected_arrival between '6/7/18' and '6/8/18'

我收到以下错误消息：

Msg 207, Level 16, State 3, Line 37 Invalid column name 'expected_arrival'.
Msg 207, Level 16, State 3, Line 37 Invalid column name 'expected_arrival'.

Answer 1

您不能在where子句中使用您使用的别名，该列中不存在该列。

您可以将where子句更改为您尝试别名的列：

    WHERE DATEADD(hour, CONVERT(INT, LEFT(CONVERT(VARCHAR(2), ISNULL(Dock_In_Time, 
'0')), 2)), CONVERT(DATETIME, ID2)) between '6/7/18' and '6/8/18'

Answer 2

将原始查询包装为派生表（子查询），然后您可以拥有该WHERE子句条件：

select *
from
(
    SELECT 'Delivery' activity_type,
    left(pod.ID1, charindex('*', pod.ID1) - 1) load_number,
    DATEADD(hour, CONVERT(INT, LEFT(CONVERT(VARCHAR(2), ISNULL(Dock_In_Time, 
    '0')), 2)), CONVERT(DATETIME, ID2)) expected_arrival
    FROM [Server].[Database].[dbo].[POD_Sched_Del] pod
) dt
WHERE expected_arrival between '6/7/18' and '6/8/18'
ORDER BY expected_arrival asc, activity_type

添加Where子句后的列名无效

2 个答案: