Re: problem join

chester c young escreveu:
> having problem joining these correctly:
>
> schedule
> - cal_id references calendar not null
> - usr_id references users not null
> = unique( calZ_id, usr_id )
> - result_no not null
>
> activity
> - cal_id references calendar not null
> - usr_id references users not null
> = unique( cal_id, usr_id )
> - from_ts timestamp not null
>
> trying to join
> - cal_id
> - usr_id
> - schedule.result_no (might be null)
> - activity.from_ts (might be null)
> where schedule.usr_id = activity.usr_id would result in one row
>

Try:
SELECT * FROM schedule FULL OUTER JOIN activity
USING (cal_id, usr_id) ....

Osvaldo