Is it possible to use parameter in a user query with subquery ?

Question

Hi ,
i need to use parameter ( [%0] ) in user query using a subquery , but i have errors message when i execute the query 
example :
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode]  =N'[%0]'
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode]  =N'[%0]'
works fine
but ( exactly the same query in the subquery )
Select t2.Docnum ,t2.cde , t2.fact from
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode]  =N'[%0]'
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode]  =N'[%0]'
) t2
return an error message
the same query without parameter works fine too :
Select Docnum ,cde , fact from
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode]  ='C1'
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode]  ='C1'
) t2
Is it possible to use parameter in a subquery ?
thanks

Answer 1

Try this one:
declare @cc nvarchar(20)
set @cc=/*Select c.cardcode from OCRD c where c.cardcode=*/'[%0]'
Select Docnum ,cde , fact from
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode]  =@cc
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode]  =@cc
) t2