Pivot SQL query output - sql

Question

I have a requirement where my query will return output something like this:
PermissionType IsAllowed
-------------------------
IsEdit | 1
IsDelete | 0
isRemove | 1
isPrint | 1
isReport | 0
-- | -
-- | -
-- | -
--------------------------
These rows can be dynamic depending upon the filter criteria I will pass.
So now I want to convert the above resultset to the following:
IsEdit | IsDelete | IsRemove | IsPrint | IsReport | -- | -- | --
--------------------------------------------------------------------
1 | 0 | 1 | 1 | 0 | - | - | -
I tried to use the pivot here but it asks the Column Names to be pivoted into the output and this is dynamic in my case, also it needed an aggregate function for FOR but I don't have any calculation in my case.
Anyone please help me on this.

Answer 1

Then try this Dynamic sql
IF OBJECT_ID('dbo.temp')IS NOT NULL
DROP TABLE temp
;WITH Cte(PermissionType, IsAllowed)
AS
(
SELECT 'IsEdit' , 1 UNION ALL
SELECT 'IsDelete' , 0 UNION ALL
SELECT 'isRemove' , 1 UNION ALL
SELECT 'isPrint' , 1 UNION ALL
SELECT 'isReport' , 0
)
SELECT *,ROW_NUMBER()OVER(ORDER BY (SELECT 1)) AS Seq INTO
temp FROM Cte
DECLARE #Sql nvarchar(max),
#Sqlcol nvarchar(max),
#ISNULLSqlcol nvarchar(max)
SELECT #Sqlcol=STUFF((SELECT ', '+QUOTENAME(PermissionType)
FROM temp ORDER BY Seq FOR XML PATH ('')),1,1,'')
SELECT #ISNULLSqlcol=STUFF((SELECT ', '+'MAX('+QUOTENAME(PermissionType) +') AS '+QUOTENAME(PermissionType)
FROM temp ORDER BY Seq FOR XML PATH ('')),1,1,'')
SET #Sql='
SELECT '+#ISNULLSqlcol+'
FROM(
SELECT * FROM temp
)AS SRC
PIVOT
(
MAX(IsAllowed) FOR PermissionType IN ('+#Sqlcol+')
) AS PVT '
PRINT #Sql
EXEC (#Sql)
IsEdit IsDelete isRemove isPrint isReport
--------------------------------------------------
1 0 1 1 0

Answer 2

With pivot and dynamic sql you can create a query that will include a different number of columns:
if OBJECT_ID('Test') is not null
drop table [dbo].[Test]
CREATE TABLE [dbo].[Test](PermissionType varchar(20), IsAllowed int)
insert into [dbo].[Test] values
('IsEdit' , 1)
,('IsDelete', 0)
,('isRemove', 1)
,('isPrint' , 1)
,('isReport', 0)
--this variable holds all the dates that will become column names
declare #permissionTypes nvarchar(max) = ''
--this variable contains the TSQL dinamically generated
declare #sql nvarchar(max) = ''
select #permissionTypes = #permissionTypes + ', ' + quotename(PermissionType)
from [dbo].[Test]
set #permissionTypes = RIGHT(#permissionTypes, len(#permissionTypes)-2)
set #sql = concat(
'select *
from [dbo].[Test]
pivot
(
max(isallowed)
for PermissionType in (', #permissionTypes, ')
) piv '
)
exec(#sql)
Result:
Adding a new row:
insert into [dbo].[Test] values
('IsNew' , 1)
Causes a new column to be created: