Question

I have this query:

DECLARE @selectsql nvarchar(4000),
DECLARE @cnt int

select @selectsql = ' SELECT ' + @cnt + '= COUNT(*) FROM Vwbckup' 

print @selectsql
print @cnt

EXEC sp_executesql @selectsql

When I execute the query I’m getting this error:

Conversion failed when converting the varchar value ‘ SELECT ‘ to data type int.

Answer 1

You don’t apparently need dynamic SQL for this but in case you do for some reason not shown you don’t need to concatenate that part at all. You can use an OUTPUT parameter.

DECLARE @selectsql NVARCHAR(4000),
        @cnt       INT

SELECT @selectsql = N'SELECT @cnt = COUNT(*) FROM Vwbckup'

PRINT @selectsql

PRINT @cnt

EXEC sp_executesql
  @selectsql,
  N'@cnt int output',
  @cnt OUTPUT

SELECT @cnt