将动态行转换为具有输出参数的列? [英] Pivot Dynamic row to Column with output parameter?
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问题描述
我在查询中旋转统计列没有问题,例如列1,列2,列3 ...等.
但是我想做的是动态的.
我的数据如下:
我希望能够执行存储过程以获取输出结果: Exec sp_output 1 (从另一个窗口,其中"1"代表PoolID(@AppPool))看起来像这样:
这是我的SP:
create PROCEDURE [dbo].[sp_test]
@Query as nvarchar(100) -- OUTPUT?,
@AppPool AS nvarchar(50)
AS
SELECT @Query = Attribute FROM [dbo].[Vy_UserAccess] WHERE PoolID = @AppPool
SELECT [Users],'+ @Query +' FROM
(SELECT [Pool],[Users],[RecNum],[Attribute],[Values] FROM [dbo].[Vy_UserAccess] ) AS T1
PIVOT (MAX([Values]) FOR [ATTRIBUTE] IN ('+ @Query +')) AS T2
是否可以通过微调代码来实现?还是我必须朝另一个方向发展?
解决方案
您可以在以下位置进行操作:
查询
CREATE PROCEDURE [dbo].[sp_test]
@AppPool AS NVARCHAR(60)
AS
DECLARE @cols AS NVARCHAR(MAX) = '',
@sql AS NVARCHAR(MAX)
SELECT @cols += QUOTENAME([Name]) + ','
FROM (SELECT DISTINCT Attribute as Name
FROM [dbo].[Vy_UserAccess]
WHERE PoolID = @AppPool
) a
ORDER BY Name DESC
SET @cols = LEFT(@cols, LEN(@cols) - 1)
SET @sql = 'SELECT Users, ' + @cols + ' FROM
(
SELECT [Pool],[Users],[RecNum],[Attribute],[Values]
FROM [dbo].[Vy_UserAccess]
) AS T1
PIVOT (MAX([Values]) FOR [ATTRIBUTE] IN ('+ @cols +')) AS T2'
EXEC sp_executesql @sql, N'@AppPool NVARCHAR(60)', @AppPool
执行
Exec sp_test 1
查询示例数据
CREATE PROCEDURE sp_test
@AppPool AS NVARCHAR(60)
AS
CREATE TABLE #test
(
PoolId NVARCHAR(60),
Pool NVARCHAR(40),
Users NVARCHAR(60),
RecNum INT,
Attribute NVARCHAR(40),
[Values] NVARCHAR(20)
)
INSERT INTO #test VALUES
('1', 'FINANCE', 'User1', 2, 'DIVISION', '010'),
('1', 'FINANCE', 'User1', 1, 'COMPANY', '1'),
('1', 'FINANCE', 'User1', 1, 'DIVISION', '050')
DECLARE @cols AS NVARCHAR(MAX) = '',
@sql AS NVARCHAR(MAX)
SELECT @cols += QUOTENAME([Name]) + ','
FROM (SELECT DISTINCT Attribute as Name
FROM #test
WHERE PoolID = @AppPool
) a
ORDER BY Name DESC
SET @cols = LEFT(@cols, LEN(@cols) - 1)
SET @sql = 'SELECT Users, ' + @cols + ' FROM
(
SELECT [Pool],[Users],[RecNum],[Attribute],[Values]
FROM #test
) AS T1
PIVOT (MAX([Values]) FOR [ATTRIBUTE] IN ('+ @cols +')) AS T2'
EXEC Sp_executesql @sql, N'@AppPool NVARCHAR(60)', @AppPool
DROP TABLE #test
输出
Users DIVISION COMPANY
User1 050 1
User1 010 NULL
There is no problem for me to pivot statistic columns in my query e.g Column 1 , Column 2 , Column 3.... and so on.
But i would like to do this dynamic instead.
My data looks like this:
i want to be able to EXECUTE a store procedure to get the output result: Exec sp_output 1 (from another window where '1' represents the PoolID (@AppPool)) to look like this:
This is my SP:
create PROCEDURE [dbo].[sp_test]
@Query as nvarchar(100) -- OUTPUT?,
@AppPool AS nvarchar(50)
AS
SELECT @Query = Attribute FROM [dbo].[Vy_UserAccess] WHERE PoolID = @AppPool
SELECT [Users],'+ @Query +' FROM
(SELECT [Pool],[Users],[RecNum],[Attribute],[Values] FROM [dbo].[Vy_UserAccess] ) AS T1
PIVOT (MAX([Values]) FOR [ATTRIBUTE] IN ('+ @Query +')) AS T2
Is this possible to achieve by just fine tuning my code or do i have to go on another direction?
解决方案
You can do It in following:
QUERY
CREATE PROCEDURE [dbo].[sp_test]
@AppPool AS NVARCHAR(60)
AS
DECLARE @cols AS NVARCHAR(MAX) = '',
@sql AS NVARCHAR(MAX)
SELECT @cols += QUOTENAME([Name]) + ','
FROM (SELECT DISTINCT Attribute as Name
FROM [dbo].[Vy_UserAccess]
WHERE PoolID = @AppPool
) a
ORDER BY Name DESC
SET @cols = LEFT(@cols, LEN(@cols) - 1)
SET @sql = 'SELECT Users, ' + @cols + ' FROM
(
SELECT [Pool],[Users],[RecNum],[Attribute],[Values]
FROM [dbo].[Vy_UserAccess]
) AS T1
PIVOT (MAX([Values]) FOR [ATTRIBUTE] IN ('+ @cols +')) AS T2'
EXEC sp_executesql @sql, N'@AppPool NVARCHAR(60)', @AppPool
EXECUTION
Exec sp_test 1
QUERY WITH SAMPLE DATA
CREATE PROCEDURE sp_test
@AppPool AS NVARCHAR(60)
AS
CREATE TABLE #test
(
PoolId NVARCHAR(60),
Pool NVARCHAR(40),
Users NVARCHAR(60),
RecNum INT,
Attribute NVARCHAR(40),
[Values] NVARCHAR(20)
)
INSERT INTO #test VALUES
('1', 'FINANCE', 'User1', 2, 'DIVISION', '010'),
('1', 'FINANCE', 'User1', 1, 'COMPANY', '1'),
('1', 'FINANCE', 'User1', 1, 'DIVISION', '050')
DECLARE @cols AS NVARCHAR(MAX) = '',
@sql AS NVARCHAR(MAX)
SELECT @cols += QUOTENAME([Name]) + ','
FROM (SELECT DISTINCT Attribute as Name
FROM #test
WHERE PoolID = @AppPool
) a
ORDER BY Name DESC
SET @cols = LEFT(@cols, LEN(@cols) - 1)
SET @sql = 'SELECT Users, ' + @cols + ' FROM
(
SELECT [Pool],[Users],[RecNum],[Attribute],[Values]
FROM #test
) AS T1
PIVOT (MAX([Values]) FOR [ATTRIBUTE] IN ('+ @cols +')) AS T2'
EXEC Sp_executesql @sql, N'@AppPool NVARCHAR(60)', @AppPool
DROP TABLE #test
OUTPUT
Users DIVISION COMPANY
User1 050 1
User1 010 NULL
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