použijte sp_executesql
a output parameter
příklad
DECLARE @sqlBody VARCHAR(500),@TableCount INT, @SQL NVARCHAR(1000)
SELECT @sqlBody = 'from sysobjects'
SELECT @SQL = N'SELECT @TableCount = COUNT(*) ' + @sqlBody
EXEC sp_executesql @SQL, N'@TableCount INT OUTPUT', @TableCount OUTPUT
SELECT @TableCount
GO