Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'."

Question

Hi,
When i executed the following query i am getting following error "Msg 214, Level 16, State 2, Procedure sp_executesql, Line 1
Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'."
I have to store value in @EndDate variable.
Please advise
Declare @SQL varchar(max)
Declare @Prd varchar(2)
Declare @Year varchar(4)
Declare @Wk varchar(2)
Declare @EndDate  varchar(100)
Declare @EndDate1  varchar(100)
select  @Prd = RIGHT('0' + cast(AS_OF_PRD AS varchar(2)),2),
        @Year = AS_OF_YR,
        @Wk = RIGHT('0' + cast(AS_OF_WK AS varchar(2)),2)
  from SCP_HEADER
  set @SQL = 'SELECT @EndDate = WK ' + @Wk +'_END_DATE  from dbo.SCP_CAL_YEAR where CAL_YR =' + @Year
execute SP_EXECUTESQL @SQL,N'@EndDate varchar(100) OUTPUT',@EndDate OUTPUT
  print @EndDate
Regards,
Amit

Answer 1

Hallo Amit,
the bug is here
Declare @SQL nvarchar(4000)
set @SQL = N'SELECT @EndDate = WK ' + @Wk +'_END_DATE  from dbo.SCP_CAL_YEAR where CAL_YR =' + @Year
BTW: I'm wondering why you concatenate the SQL String but didn't put them as variables to sp_executeSQL
Exactly that's one of the essentials of sp_executeSQL
http://msdn.microsoft.com/en-us/library/aa933299(v=sql.80).aspx
Uwe Ricken
MCITP Database Administrator 2005
MCITP Database Administrator 2008
MCITS Microsoft SQL Server 2008, Database Development
db Berater GmbH
http://www-db-berater.de