Sorry. forgot to replace the table names in the cte.

DECLARE @MissingNumbers TABLE (N INT)

Declare @vMax int

INSERT INTO @MissingNumbers

VALUES (19),(20)

Set @vMax = (Select MAX(N) from @MissingNumbers)

;with wcte as (

Select Top(@vMax) ROW_NUMBER() over(order by a.Object_id,a.Column_ID) NAll

from sys.columns a, sys.columns b

) Select NAll from wcte a

Left outer Join @MissingNumbers b on b.N = a.Nall

where b.N is Null

Atif Sheikh