在SQL中，如何将行号（）添加到from子句中的当前子查询中？

如上所述，我试图将此行编号查询作为子查询放入我的from子句中：

SELECT *
FROM (
     SELECT *, ROW_NUMBER() OVER (ORDER BY CaseID) AS RowNum
     FROM T.dbo.CompletedCase
     ) AS MyDerivedTable
WHERE MyDerivedTable.RowNum BETWEEN 0 AND 25

这就是我试图提出的问题

SELECT DISTINCT c.UserId, (u.FirstName + ' ' + u.LastName) AS [UserName], Count(c.UserId +c.CaseId+c.LineNumber) AS [CompletedCase]
FROM T.dbo.CompletedCase c join T.dbo.User u on c.UserId = u.UserID
WHERE c.PrintDateTime >= '2014-01-27 7:00' AND c.PrintDateTime <= '2014-01-27 17:00'
Group By u.FirstName, u.LastName, c.UserId
Order By [UserName]

---

我见过不同的人如何将相似的东西应用到他们的身上，但我不知道如何在from子句中应用它。如果你能解释一些答案，我将不胜感激！如果在SELECT子句中有更好的方法来实现这一点，那么我将尝试它。对我来说，放在FROM子句中是有意义的，因为它就是从中提取行的。谢谢你的帮助。

你应该能够做完全相同的事情，尽管我无法想象你想要完成什么：

Select  *
From (
        SELECT DISTINCT ROW_NUMBER() Over(Order By c.UserId) rn, c.UserId, (u.FirstName + ' ' + u.LastName) AS [UserName], Count(c.UserId +c.CaseId+c.LineNumber) AS [CompletedCase]
        FROM T.dbo.CompletedCase c join T.dbo.User u on c.UserId = u.UserID
        WHERE c.PrintDateTime >= '2014-01-27 7:00' AND c.PrintDateTime <= '2014-01-27 17:00'
        Group By u.FirstName, u.LastName, c.UserId
    ) x
Where   x.rn Between 0 and 25
Order By [UserName]

就我个人而言，我喜欢用CTE做这种事情：

;with cte as
(
    SELECT  DISTINCT ROW_NUMBER() Over(Order By c.UserId) rn
            ,c.UserId
            ,(u.FirstName + ' ' + u.LastName) AS [UserName]
            ,Count(c.UserId +c.CaseId+c.LineNumber) AS [CompletedCase]
    FROM T.dbo.CompletedCase c
    join T.dbo.User u
        on c.UserId = u.UserID
    WHERE c.PrintDateTime >= '2014-01-27 7:00' AND c.PrintDateTime <= '2014-01-27 17:00'
    Group By u.FirstName, u.LastName, c.UserId
)
Select  UserId
        ,UserName
        ,CompletedCase
From    cte
Where   rn Between 0 And 25
Order By [UserName]

但是，似乎您只需要前25行，那么为什么不：

SELECT DISTINCT Top 25, c.UserId, (u.FirstName + ' ' + u.LastName) AS [UserName], Count(c.UserId +c.CaseId+c.LineNumber) AS [CompletedCase]
FROM T.dbo.CompletedCase c join T.dbo.User u on c.UserId = u.UserID
WHERE c.PrintDateTime >= '2014-01-27 7:00' AND c.PrintDateTime <= '2014-01-27 17:00'
Group By u.FirstName, u.LastName, c.UserId
Order By [UserName]

---

我不完全明白你的意思。你想添加行号并限制第二次查询的结果吗？我需要前25行，然后是26-50行，这就是为什么我要这样做。你是什么意思？您运行一次查询以获得前25个，然后运行一个稍微不同的查询以获得26-50个？为什么？两张不同的桌子，我只是按照给我的指示走。是，运行1-25然后26-50的查询。你最上面的一个有效，但订单没有起作用。它说：ORDERBY子句在视图、内联函数、派生表、子查询和公共表表达式中无效，除非还指定了TOP或FOR XML。我的错误。修复了按顺序移动到派生表/cte外部的前两个查询。