SQL Server 2008でページネーションをどのように行いますか?
あなたは次のようなものを試すことができます
DECLARE @Table TABLE(
Val VARCHAR(50)
)
DECLARE @PageSize INT,
@Page INT
SELECT @PageSize = 10,
@Page = 2
;WITH PageNumbers AS(
SELECT Val,
ROW_NUMBER() OVER(ORDER BY Val) ID
FROM @Table
)
SELECT *
FROM PageNumbers
WHERE ID BETWEEN ((@Page - 1) * @PageSize + 1)
AND (@Page * @PageSize)
ROW_NUMBER() を使用できます。
結果セットのパーティション内の行の連続番号を返します。各パーティションの最初の行の1から始まります。
例:
WITH CTEResults AS
(
SELECT IDColumn, SomeField, DateField, ROW_NUMBER() OVER (ORDER BY DateField) AS RowNum
FROM MyTable
)
SELECT *
FROM CTEResults
WHERE RowNum BETWEEN 10 AND 20;
SQL Server 2012はページネーション機能を提供します( http://www.codeproject.com/Articles/442503/New-features-for-database-developers-in-SQL-Server を参照)
SQL2008では、次の方法で実行できます。
declare @rowsPerPage as bigint;
declare @pageNum as bigint;
set @rowsPerPage=25;
set @pageNum=10;
With SQLPaging As (
Select Top(@rowsPerPage * @pageNum) ROW_NUMBER() OVER (ORDER BY ID asc)
as resultNum, *
FROM Employee )
select * from SQLPaging with (nolock) where resultNum > ((@pageNum - 1) * @rowsPerPage)
証明済み!一貫して機能し、スケーリングします。
1)ダミーデータの作成
CREATE TABLE #employee (EMPID INT IDENTITY, NAME VARCHAR(20))
DECLARE @id INT = 1
WHILE @id < 200
BEGIN
INSERT INTO #employee ( NAME ) VALUES ('employee_' + CAST(@id AS VARCHAR) )
SET @id = @id + 1
END
2)今すぐソリューションを適用してください。
このケースでは、EMPIDが一意でソートされた列であると想定しています。
コース外では、別の列に適用します...
DECLARE @pageSize INT = 20
SELECT * FROM (
SELECT *, PageNumber = CEILING(CAST(EMPID AS FLOAT)/@pageSize)
FROM #employee
) MyQuery
WHERE MyQuery.PageNumber = 1
これらは、SQLサーバー側でクエリの結果をページングするための私のソリューションです。フィルタリングと並べ替えの概念を1列で追加しました。 Gridviewでページング、フィルタリング、順序付けをしているときに非常に効率的です。
テストする前に、サンプルテーブルを1つ作成し、このテーブルに行を挿入する必要があります(実際には、テーブルフィールドを考慮してWhere句を変更する必要があり、selectの主要部分に結合とサブクエリが含まれる場合があります)
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
SQL Server 2008では、CTEコンセプトを使用できます。そのため、SQL Server 2008+用に2種類のクエリを作成しました
-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
SQL Server 2008+のCTEによる2番目のソリューション
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
少なくともSQL 2005で機能する別のソリューションは、SELECTサブクエリとORDER BY句でTOPを使用することです。
簡単に言うと、ページごとに10行のページ2行を取得することは、最初の20行の最後の10行を取得することと同じです。これは、ASCを使用して再度注文する前に、ASCの順序で最初の20行を取得し、次にDESCの順序で最初の10行を取得することに変換されます。
例:ページごとに3行のページ2行を取得する
create table test(id integer);
insert into test values(1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
select *
from (
select top 2 *
from (
select top (4) *
from test
order by id asc) tmp1
order by id desc) tmp1
order by id asc