Re: difficult JOIN
От | Sim Zacks |
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Тема | Re: difficult JOIN |
Дата | |
Msg-id | ct7n9d$175f$1@news.hub.org обсуждение исходный текст |
Ответ на | difficult JOIN ("Thomas Chille (spoon)" <t.chille@spoon.de>) |
Список | pgsql-general |
You're going to need a cursor or a for loop. No way to join them. ""Thomas Chille (spoon)"" <t.chille@spoon.de> wrote in message news:006101c502f9$342920b0$500a0a0a@spoon.de... > 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 > > > ---------------------------(end of broadcast)--------------------------- > TIP 8: explain analyze is your friend >
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