In article <987929295D1345B5BCE249F42730CB82@marktestcr.marktest.pt>,
"Oliveiros" <oliveiros.cristina@marktest.pt> writes:
> Hi, Thomas.
> I believe it is because of your WHERE clause, which is filtering out the nulls
> from hp table.
> According to
> WHERE
> hp.poste_idposte = 275
> You only want registers that have hp.poste_idposte = 275, not the null ones.
Yes, the WHERE effectively turns the outer into an inner join, thus
removing rows from the right table. By moving the WHERE to the JOIN
condition, you get the result you expected.