在SQL Server 2000、2005、2008、2012中分页结果的最佳方法(性能方面)是什么?如果你还想获得结果的总数(在分页之前)?
当前回答
对于SQL Server 2000，您可以使用一个带有IDENTITY列的表变量来模拟ROW_NUMBER():
DECLARE @pageNo int -- 1 based
DECLARE @pageSize int
SET @pageNo = 51
SET @pageSize = 20
DECLARE @firstRecord int
DECLARE @lastRecord int
SET @firstRecord = (@pageNo - 1) * @pageSize + 1 -- 1001
SET @lastRecord = @firstRecord + @pageSize - 1 -- 1020
DECLARE @orderedKeys TABLE (
rownum int IDENTITY NOT NULL PRIMARY KEY CLUSTERED,
TableKey int NOT NULL
)
SET ROWCOUNT @lastRecord
INSERT INTO @orderedKeys (TableKey) SELECT ID FROM Orders WHERE OrderDate >= '1980-01-01' ORDER BY OrderDate
SET ROWCOUNT 0
SELECT t.*
FROM Orders t
INNER JOIN @orderedKeys o ON o.TableKey = t.ID
WHERE o.rownum >= @firstRecord
ORDER BY o.rownum
这种方法可以扩展到具有多列键的表，并且不会引起使用OR(跳过索引使用)的性能开销。缺点是，如果数据集非常大，并且其中一个接近最后一页，则会占用大量临时空间。在这种情况下，我没有测试游标的性能，但它可能会更好。
注意，这种方法可以针对数据的第一页进行优化。另外，使用ROWCOUNT是因为TOP在SQL Server 2000中不接受变量。
其他回答
create PROCEDURE SP_Company_List (@pagesize int= -1，@pageindex int= 0) 选择Id, NameEn从公司订单的Id ASC OFFSET (@pageindex-1)* @pagesize ROWS FETCH NEXt @pagesize ROWS ONLY END GO 声明@return_value int EXEC @return_value = [dbo]。[SP_Company_List] @pagesize = 1， > @pageindex = 2 SELECT 'Return Value' = @return_value 去
http://www.codeproject.com/KB/aspnet/PagingLarge.aspx上有关于不同分页技术的很好的概述
我经常在SQL Server 2000中使用ROWCOUNT方法(也可以在2005和2008中使用，只测量与ROW_NUMBER相比的性能)，它的速度非常快，但你需要确保排序的列(大多数)具有唯一的值。
获取结果总数和分页是两个不同的操作。对于这个示例，让我们假设您正在处理的查询是
SELECT * FROM Orders WHERE OrderDate >= '1980-01-01' ORDER BY OrderDate
在这种情况下，您将使用以下命令确定结果的总数:
SELECT COUNT(*) FROM Orders WHERE OrderDate >= '1980-01-01'
.．.这可能看起来效率很低，但实际上性能很好，假设所有索引等都正确设置。
接下来，要以分页方式返回实际结果，下面的查询将是最有效的:
SELECT *
FROM ( SELECT ROW_NUMBER() OVER ( ORDER BY OrderDate ) AS RowNum, *
FROM Orders
WHERE OrderDate >= '1980-01-01'
) AS RowConstrainedResult
WHERE RowNum >= 1
AND RowNum < 20
ORDER BY RowNum
这将返回原始查询的第1-19行。这里很酷的事情是，尤其是对于web应用程序，你不需要保留任何状态，除了要返回的行号。
对于SQL Server 2000，您可以使用一个带有IDENTITY列的表变量来模拟ROW_NUMBER():
DECLARE @pageNo int -- 1 based
DECLARE @pageSize int
SET @pageNo = 51
SET @pageSize = 20
DECLARE @firstRecord int
DECLARE @lastRecord int
SET @firstRecord = (@pageNo - 1) * @pageSize + 1 -- 1001
SET @lastRecord = @firstRecord + @pageSize - 1 -- 1020
DECLARE @orderedKeys TABLE (
rownum int IDENTITY NOT NULL PRIMARY KEY CLUSTERED,
TableKey int NOT NULL
)
SET ROWCOUNT @lastRecord
INSERT INTO @orderedKeys (TableKey) SELECT ID FROM Orders WHERE OrderDate >= '1980-01-01' ORDER BY OrderDate
SET ROWCOUNT 0
SELECT t.*
FROM Orders t
INNER JOIN @orderedKeys o ON o.TableKey = t.ID
WHERE o.rownum >= @firstRecord
ORDER BY o.rownum
这种方法可以扩展到具有多列键的表，并且不会引起使用OR(跳过索引使用)的性能开销。缺点是，如果数据集非常大，并且其中一个接近最后一页，则会占用大量临时空间。在这种情况下，我没有测试游标的性能，但它可能会更好。
注意，这种方法可以针对数据的第一页进行优化。另外，使用ROWCOUNT是因为TOP在SQL Server 2000中不接受变量。
这些是我在SQL server端对查询结果进行分页的解决方案。 这些方法在SQL Server 2008和2012之间是不同的。 此外，我还添加了过滤和排序的概念。当你在Gridview中分页、过滤和排序时，它是非常高效的。
在测试之前，你必须创建一个示例表，并在这个表中插入一些行:(在现实世界中，你必须改变Where子句，考虑到你的表字段，也许你有一些连接和子查询在select的主要部分)
Create Table VLT
(
ID int IDentity(1,1),
Name nvarchar(50),
Tel Varchar(20)
)
GO
Insert INTO VLT
VALUES
('NAME' + Convert(varchar(10),@@identity),'FAMIL' + Convert(varchar(10),@@identity))
GO 500000
在所有这些示例中，我想查询每页200行，我正在获取页码为1200的行。
在SQL server 2008中，您可以使用CTE概念。因此，我为SQL server 2008+编写了两种类型的查询
SQL Server 2008+
DECLARE @PageNumber Int = 1200
DECLARE @PageSize INT = 200
DECLARE @SortByField int = 1 --The field used for sort by
DECLARE @SortOrder nvarchar(255) = 'ASC' --ASC or DESC
DECLARE @FilterType nvarchar(255) = 'None' --The filter type, as defined on the client side (None/Contain/NotContain/Match/NotMatch/True/False/)
DECLARE @FilterValue nvarchar(255) = '' --The value the user gave for the filter
DECLARE @FilterColumn int = 1 --The column to wich the filter is applied, represents the column number like when we send the information.
SELECT
Data.ID,
Data.Name,
Data.Tel
FROM
(
SELECT
ROW_NUMBER()
OVER( ORDER BY
CASE WHEN @SortByField = 1 AND @SortOrder = 'ASC'
THEN VLT.ID END ASC,
CASE WHEN @SortByField = 1 AND @SortOrder = 'DESC'
THEN VLT.ID END DESC,
CASE WHEN @SortByField = 2 AND @SortOrder = 'ASC'
THEN VLT.Name END ASC,
CASE WHEN @SortByField = 2 AND @SortOrder = 'DESC'
THEN VLT.Name END ASC,
CASE WHEN @SortByField = 3 AND @SortOrder = 'ASC'
THEN VLT.Tel END ASC,
CASE WHEN @SortByField = 3 AND @SortOrder = 'DESC'
THEN VLT.Tel END ASC
) AS RowNum
,*
FROM VLT
WHERE
( -- We apply the filter logic here
CASE
WHEN @FilterType = 'None' THEN 1
-- Name column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 1
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.ID LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 1
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.ID NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 1
AND VLT.ID = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 1
AND VLT.ID <> @FilterValue THEN 1
-- Name column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 2
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Name LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 2
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Name NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 2
AND VLT.Name = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 2
AND VLT.Name <> @FilterValue THEN 1
-- Tel column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 3
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Tel LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 3
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Tel NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 3
AND VLT.Tel = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 3
AND VLT.Tel <> @FilterValue THEN 1
END
) = 1
) AS Data
WHERE Data.RowNum > @PageSize * (@PageNumber - 1)
AND Data.RowNum <= @PageSize * @PageNumber
ORDER BY Data.RowNum
GO
在SQL server 2008+中使用CTE的第二个解决方案
DECLARE @PageNumber Int = 1200
DECLARE @PageSize INT = 200
DECLARE @SortByField int = 1 --The field used for sort by
DECLARE @SortOrder nvarchar(255) = 'ASC' --ASC or DESC
DECLARE @FilterType nvarchar(255) = 'None' --The filter type, as defined on the client side (None/Contain/NotContain/Match/NotMatch/True/False/)
DECLARE @FilterValue nvarchar(255) = '' --The value the user gave for the filter
DECLARE @FilterColumn int = 1 --The column to wich the filter is applied, represents the column number like when we send the information.
;WITH
Data_CTE
AS
(
SELECT
ROW_NUMBER()
OVER( ORDER BY
CASE WHEN @SortByField = 1 AND @SortOrder = 'ASC'
THEN VLT.ID END ASC,
CASE WHEN @SortByField = 1 AND @SortOrder = 'DESC'
THEN VLT.ID END DESC,
CASE WHEN @SortByField = 2 AND @SortOrder = 'ASC'
THEN VLT.Name END ASC,
CASE WHEN @SortByField = 2 AND @SortOrder = 'DESC'
THEN VLT.Name END ASC,
CASE WHEN @SortByField = 3 AND @SortOrder = 'ASC'
THEN VLT.Tel END ASC,
CASE WHEN @SortByField = 3 AND @SortOrder = 'DESC'
THEN VLT.Tel END ASC
) AS RowNum
,*
FROM VLT
WHERE
( -- We apply the filter logic here
CASE
WHEN @FilterType = 'None' THEN 1
-- Name column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 1
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.ID LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 1
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.ID NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 1
AND VLT.ID = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 1
AND VLT.ID <> @FilterValue THEN 1
-- Name column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 2
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Name LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 2
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Name NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 2
AND VLT.Name = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 2
AND VLT.Name <> @FilterValue THEN 1
-- Tel column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 3
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Tel LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 3
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Tel NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 3
AND VLT.Tel = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 3
AND VLT.Tel <> @FilterValue THEN 1
END
) = 1
)
SELECT
Data.ID,
Data.Name,
Data.Tel
FROM Data_CTE AS Data
WHERE Data.RowNum > @PageSize * (@PageNumber - 1)
AND Data.RowNum <= @PageSize * @PageNumber
ORDER BY Data.RowNum
SQL Server 2012+
DECLARE @PageNumber Int = 1200
DECLARE @PageSize INT = 200
DECLARE @SortByField int = 1 --The field used for sort by
DECLARE @SortOrder nvarchar(255) = 'ASC' --ASC or DESC
DECLARE @FilterType nvarchar(255) = 'None' --The filter type, as defined on the client side (None/Contain/NotContain/Match/NotMatch/True/False/)
DECLARE @FilterValue nvarchar(255) = '' --The value the user gave for the filter
DECLARE @FilterColumn int = 1 --The column to wich the filter is applied, represents the column number like when we send the information.
;WITH
Data_CTE
AS
(
SELECT
*
FROM VLT
WHERE
( -- We apply the filter logic here
CASE
WHEN @FilterType = 'None' THEN 1
-- Name column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 1
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.ID LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 1
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.ID NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 1
AND VLT.ID = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 1
AND VLT.ID <> @FilterValue THEN 1
-- Name column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 2
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Name LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 2
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Name NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 2
AND VLT.Name = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 2
AND VLT.Name <> @FilterValue THEN 1
-- Tel column filter
WHEN @FilterType = 'Contain' AND @FilterColumn = 3
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Tel LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'NotContain' AND @FilterColumn = 3
AND ( -- In this case, when the filter value is empty, we want to show everything.
VLT.Tel NOT LIKE '%' + @FilterValue + '%'
OR
@FilterValue = ''
) THEN 1
WHEN @FilterType = 'Match' AND @FilterColumn = 3
AND VLT.Tel = @FilterValue THEN 1
WHEN @FilterType = 'NotMatch' AND @FilterColumn = 3
AND VLT.Tel <> @FilterValue THEN 1
END
) = 1
)
SELECT
Data.ID,
Data.Name,
Data.Tel
FROM Data_CTE AS Data
ORDER BY
CASE WHEN @SortByField = 1 AND @SortOrder = 'ASC'
THEN Data.ID END ASC,
CASE WHEN @SortByField = 1 AND @SortOrder = 'DESC'
THEN Data.ID END DESC,
CASE WHEN @SortByField = 2 AND @SortOrder = 'ASC'
THEN Data.Name END ASC,
CASE WHEN @SortByField = 2 AND @SortOrder = 'DESC'
THEN Data.Name END ASC,
CASE WHEN @SortByField = 3 AND @SortOrder = 'ASC'
THEN Data.Tel END ASC,
CASE WHEN @SortByField = 3 AND @SortOrder = 'DESC'
THEN Data.Tel END ASC
OFFSET @PageSize * (@PageNumber - 1) ROWS FETCH NEXT @PageSize ROWS ONLY;
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