Question

我想要一个存储过程为y个页面取x个数据行。例如

我有20个数据流我的页面大小是2 如果我选择第2页我将获得数据行17,18

我可以使用前200并使用order by来选择第一个和最后一个datarow但是我如何获取它们之间的页面。

@PageNumber INT
As
BEGIN
SELECT COUNT(rate.RateID)/200 FROM  dbo.Rate where dbo.Rate.Hourly =0 

DECLARE @LastIndex INT
SET @LastIndex= (SELECT TOP 1 rate.RateID FROM  dbo.Rate where dbo.Rate.Hourly =0  ORDER BY rate.RateID ASC) 

Select TOP 200
    [RateID],
    [PairID],
    [Open],
    [Close],
    [High],
    [Low],
    [Difference],
    [Average],
    [Percentage],
    [InfoDate],
    [Hourly],
    [CaptureDateTime]
From Rate
WHERE Hourly =0 AND RateID >=(@LastIndex+(200* @PageNumber))
ORDER BY [RateID] ASC

结束这就是我现在所拥有的，但它不能正常工作

Answer 1

好的，既然你没有指定你正在使用的RDBMS，我可以给你一个至少对SQL Server 2005 +有效的解决方案。

DECLARE @PageNumber INT, @PageSize INT
SET @PageNumber = 3
SET @PageSize = 5;

WITH CTE AS
(
    SELECT *, ROW_NUMBER() OVER(ORDER BY RateID) Corr
    FROM Rate
    WHERE Hourly = 0
)
SELECT *
FROM CTE
WHERE Corr BETWEEN @PageNumber*@PageSize AND @PageNumber*@PageSize+@PageSize-1

此外，您应该知道在下一版本的SQL Server（“Denali”）中，通过对TOP子句进行一些修改，这将更加容易。

Answer 2

Select  * from(
SELECT
    (ROW_NUMBER()OVER (ORDER BY InfoDate ASC)) AS RowNo,
    [RateID],
    [PairID],
    [Open],
    [Close],
    [High],
    [Low],
    [Difference],
    [Average],
    [Percentage],
    [InfoDate],
    [Hourly],
    [CaptureDateTime]
From Rate
) AS T
WHERE t.RowNo 
BETWEEN 200*@PageNumber AND 200 * (@PageNumber+1)-1
ORDER BY RowNo DESC

这就是我用过的......

按存储过程进行数据库分页

2 个答案: