From: | "Thomas Chille (spoon)" <t(dot)chille(at)spoon(dot)de> |
---|---|
To: | <pgsql-general(at)postgresql(dot)org> |
Subject: | difficult JOIN |
Date: | 2005-01-25 16:16:19 |
Message-ID: | 006101c502f9$342920b0$500a0a0a@spoon.de |
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Thread: | |
Lists: | pgsql-general |
Hi,
i have the following SQL-Problem:
We are using 2 tables. The first, called plan, is holding planned working times for employees per
tour:
plan.id_tour
plan.id_employee
plan.begin_time
plan.end_time
The second table 'work' stores the actual worked times for employees per tour:
work.id_tour
work.id_employee
work.begin_time
work.end_time
Employees can be multiple times assigned to one tour. One record will be created for every
assignment. They can also work multiple times in one tour.
Now i wanna merge this infos into one report. I wanna join the first plan entry for one employee in
one tour with the first work entry for one employee in one tour and so on.
How can i obtain that? A simply USING(id_tour, id_employee) -JOIN will not doit.
Thanks for any hints,
Thomas
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