How to rename column with prefixes of a result table, the result table is obtained using pivot query - sql-server-2008

Question

I have two tables named Emp and TrainingTable
Emp columns (EmpId(PK, int, not null), EmpName(nchar(10), null))
TrainingTable columns (EmpId(FK, int, null), TainingId(int, null), TainingName(nvarchar(50), not null))
Code:
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
select #cols = STUFF((SELECT ',' + QUOTENAME(TainingId)
from TrainingTable
group by TainingId
order by TainingId
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT EmpName,' + #cols + ' from
(
select Emp.EmpName, TainingName, TainingId
from TrainingTable INNER JOIN Emp ON TrainingTable.EmpId = Emp.EmpId
) x
pivot
(
max(TainingName)
for TainingId in (' + #cols + ')
) p '
execute(#query)
Now what I want to do is to rename the columns 1,2,3.. with Training1,Traning2,.. and so on..
the result table may change depending on data. columns may increase..
I tried almost every thing .. but not getting the correct way to achieve it.

Answer 1

Try this
You need to cast your column Using CAST()
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
select #cols = STUFF((SELECT ',' + QUOTENAME('Training' + CAST(TainingId AS Varchar(50)))
from TrainingTable
group by TainingId
order by TainingId
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT EmpName,' + #cols + ' from
(
select Emp.EmpName,
TainingName,
col = ''Training'' + cast(TainingId as varchar(10))
from TrainingTable
INNER JOIN Emp ON TrainingTable.EmpId = Emp.EmpId
) x
pivot
(
max(TainingName)
for col in (' + #cols + ')
) p '
execute(#query)
Refer