>>Yes, of course you are right. My example was for a table without order, without filter, and without deleted records (+ SET DELETED ON).
>
>It was only to make clear to the OP that he will start an adventure.
>
>I've never used SET KEY so I've learned something on this subject today.

If it can be used, set key is often the fastest way available. So think about use ... again, set key if you are not worried about in-between writes instead of a cursor or view if handling a local table.