>I am working on a SQL Select where result is parts/items used prior to a certain date but not used after this date. Here is my attempt which does not seem to work
>
>

>select * from part_file where part_pk in (select part_pk from part_used
>where used_date !> '20100101' and used_date < '20100101')
>

>
>How do I need to change the above SQL Select?

select * from dbo.part_file p where not exists (select 1 from dbo.part_used pu where used_date >='20100101' and pu.part_pk = p.part_pk)

Select all parts which were not used after 01-01-2010. (This may return parts which were not used at all)

We can add the other part to this query to make sure the parts were used, e.g.

select * from dbo.part_file p where not exists (select 1 from dbo.part_used pu where used_date >='20100101' and pu.part_pk = p.part_pk)
and exists (select 1 from dbo.part_used pu where used_date <'20100101' and pu.part_pk = p.part_pk)