Sql server 如何在ROW_NUMBER（）函数和Union中获取筛选记录？

我有一个从表中获取结果的联合查询。 当只执行第一个查询时，该工作正常，但如果在第二个查询（联合部分）中也返回该时间的结果，则它将不工作。 我的问题是

Select * from (
Select  ROW_NUMBER() OVER(ORDER BY EmpID DESC) as RowNo,
    Emp.EMPID, EMP.FirstName
    From Emp
Union
Select ROW_NUMBER() OVER(ORDER BY EMPID DESC) as RowNo,
    Emp.EMPID, EMP.FirstName
    From Emp Inner Join EMPDetail On Emp.EmpID = EMPDetail.EMPID 
    Where EMPDetail.IsActive=True
    ) as _EmpTable where RowNo between 1 and 20

---

请帮我做这个。我想使用行号添加分页。是否有其他解决方案？

这可能对您有所帮助-

SELECT * 
FROM (
    SELECT *, ROW_NUMBER() OVER (ORDER BY e.EmpID DESC) AS RowNo
    FROM (
        SELECT /*TOP 20*/
            e.EmpID,
            e.FirstName
        FROM dbo.Emp e
        ORDER BY e.EmpID DESC

        UNION

        SELECT /*TOP 20*/
            e.EMPID,
            e.FirstName
        FROM dbo.Emp e
        WHERE EXISTS(
            SELECT 1 
            FROM dbo.EMPDetail ed
            WHERE e.EmpID = ed.EmpID
                AND ed.IsActive = 'TRUE'
        ) 
        ORDER BY e.EmpID DESC
    ) t
) t
WHERE t.RowNo BETWEEN 1 AND 20

---

在执行

行编号（）ing

之前，您需要围绕

联合进行另一个子查询：

Select * 
from 
(
    Select  ROW_NUMBER() OVER(ORDER BY EmpID DESC) as RowNo,
        EmpID, 
        FirstName
    FROM
    (
        SELECT 
            Emp.EMPID, 
            Emp.FirstName
        From Emp

        Union

        Select 
            Emp.EMPID, 
            EMP.FirstName
        From 
            Emp Inner Join EMPDetail On Emp.EmpID = EMPDetail.EMPID 
        Where 
            EMPDetail.IsActive=True
    )
) as _EmpTable 
where 
    RowNo between 1 and 20