查找特定记录的页码

Question

我的users表，表结构是：

ID UserName
 1   AAA
 4   BBB
 7   CCC
 ........
 ........

其中 ID 是主键和身份字段。

假设PageSize 为10，我想find the page number for the ID 43。有没有办法在哪个页面找到ID（43）？

谢谢！

Answer 1

试试这个：

DECLARE @PageSize INT = 10
DECLARE @Order DECIMAL(10,2)
DECLARE @UserID INT = 1

SET @Order = (  SELECT  OrderNo
                FROM
                    (SELECT *, ROW_NUMBER() OVER (ORDER BY UserID) AS OrderNo
                     FROM   Users
                    ) AS U
                WHERE U.UserID = @UserID
             )

SELECT @UserID AS UserID, CEILING(@Order/@PageSize) PageNo

Answer 2

您可以使用Row_Number 和分区选项来实现这一点。

SELECT  ROW_NUMBER() OVER (ORDER BY UserID) AS OrderNo, *
                     FROM   Users

现在您只需使用页面大小给出 where 条件即可找出页面编号。在您的情况下，简单查询会给出没有分区选项的结果。

Declare @userid int =  43,    @PageSize int = 10

;with cte as
(
  SELECT  
       ROW_NUMBER() OVER (ORDER BY UserID) AS OrderNo, *
  FROM   Users 
)                     

Select 
      CEILING(OrderNo/@PageSize) PageNo 
FROM 
       cte where userID = @UserID 

带有分区选项的行号。如果您想在另一列上重新排序，那么，

;with cte as
    (
      SELECT  
           ROW_NUMBER() OVER (PARTITION BY CompanyId ORDER BY UserID ) AS OrderNo, *
      FROM   Users 
    )           
Select 
          CEILING(OrderNo/@PageSize) PageNo 
    FROM 
           cte where userID = @UserID