SQL 设置子查询 where 来自主查询的值

Question

希望从主查询中获取子查询值中的 where 语句值。

这是我试图实现的目标的简化版本，但它会给你这个想法。

SELECT  Date, Day, Year, 

(SELECT COUNT(*) AS [Moves]
FROM 
    (
    SELECT moves AS too
    FROM moveevent
    FULL OUTER JOIN job AS too ON moves = too.jobid
    WHERE  (moveevent.time >= [start] and moveevent.time <= [end])
UNION ALL
    SELECT moves AS frm
    FROM moveevent
    FULL OUTER JOIN job AS frm ON moves = frm.jobid
    WHERE  (moveevent.time >= [start] and moveevent.time <= [end])
    )   
    AS m
FULL OUTER JOIN job ON m.too = jobid
WHERE mainjobid = jobid
GROUP BY jobid) 
) 
      AS [Total Moves by Shift],


FROM    job
LEFT OUTER JOIN mainjob ON jobid = mainjobid

WHERE jobid = '12345' 
and [start] = '2013-05-25 12:45:00.000'
and [end] = '2013-05-25 17:45:00.000'

基本上我希望子查询中的开始和结束值由主查询定义，但我不能让它们成为有效的列名。

名称“start”和“end”，它们不是任何表中的字段，它们只是组成，我希望能够在底部的主查询 where 子句中设置它们。

Answer 1

试试看：

DECLARE @start DATETIME, @end DATETIME
SET @start = '2013-05-25 12:45:00.000'
SET @end = '2013-05-25 17:45:00.000'
       (SELECT COUNT(*) AS [Moves]
    FROM 
        (
        SELECT moves AS too
        FROM moveevent
        FULL OUTER JOIN job AS too ON moves = too.jobid
        WHERE  (moveevent.time >= @start and moveevent.time <= @end)
    UNION ALL
        SELECT moves AS frm
        FROM moveevent
        FULL OUTER JOIN job AS frm ON moves = frm.jobid
        WHERE  (moveevent.time >= @start and moveevent.time <= @end)
        )   
        AS m

我很快测试了它，但没有确定。请给我反馈。