To find the start of all the gaps:

Select k.numfield+1 as manko From yourtable k;
   Where k.numfield+1 Not in (Select numfield From yourtable)

>A table has an index column that starts at one and goes to N, with some missing values. Is there an SQL Select statement (its ok to use more than one) that will return the first x items that are NOT present in the column?
>
>TIA,
>
>Alex