On 5 apr 2006, at 16.39, Jonas F. Henriksen wrote:
> Hi,
>
> I'm working with postgres and I have a question regarding a self-
> join on
> my table (se below for table definition and testdata):
> I want to retrieve all depths that have either a measuretype=1040 or a
> measuretype=4001 or both.
> All help apreciated (hope you understand what I want to do...),
Not sure I understand why you need a join... You say you want to
retrieve all depths that have certain measuretypes. Wouldn't the
following query do?
SELECT DISTINCT depth FROM testtable WHERE measuretype IN (1040, 4001);
Is there anything else you need from the query as well?
Mvh,
Niklas Johansson
Tel: 0322-108 18
Mobil: 0708-55 86 90