how to dispaly particular id data usig pivot?

hi i am new to crystal report . Actually i am display all details by using below query but i want to display only for particular id or particular person help me by modifing below query

Declare @year varchar(max)=''
 SELECT
       @year= Stuff((SELECT ', [' + cast(s as varchar(max))+']'
        FROM
        (SELECT DISTINCT DATEPART(YYYY,Sdate) as s FROM  dbo.StudDet
         ) x
        For XML PATH ('')),1,1,'')

exec('select Months,'+@year+'
from
(
  select cast(DATEPART(MONTH,Sdate) as varchar(max)) as Months,Score,
  DATEPART(year,Sdate) as st
  from dbo.StudDet
) x
pivot
(
  max(Score)
  for st in('+@year+')
)p ')

Tags: C#, SQL, Windows Forms