Re: union query doubt:
От | Jean-Luc Lachance |
---|---|
Тема | Re: union query doubt: |
Дата | |
Msg-id | 3DF76E6F.144FEA5A@nsd.ca обсуждение исходный текст |
Ответ на | Re: union query doubt: (Frank Bax <fbax@sympatico.ca>) |
Список | pgsql-sql |
I think you meant: SELECT date, sum( case when point = 1 then flow else 0 end) as flow1, sum( case when point = 2 then flow else 0 end) as flow2, sum( case when point = 3 then flow else 0 end) as flow3, sum( case when point = 4 then flow else 0 end) as flow4, sum( case when point = 5 then flow else 0 end) as flow5, sum( case when point = 6 then flow else 0 end) as flow6 from samples group by date; Frank Bax wrote: > > At 11:21 AM 12/11/02, javier garcia wrote: > >I've got a table with three fields: DATE, POINT, FLOW. The POINT field can > >have values among 1 and 6. So, for a same date I have six different points > >with the correspondings flows. > >I would like to make a query to obtain something like: > >DATE POINT1 POINT2 POINT3 POINT4 POINT5 POINT6 > > > >where for a date I have the flows data of the different points. > > SELECT date, > case when point = 1 then flow else 0 end as flow1, > case when point = 2 then flow else 0 end as flow2, > case when point = 3 then flow else 0 end as flow3, > case when point = 4 then flow else 0 end as flow4, > case when point = 5 then flow else 0 end as flow5, > case when point = 6 then flow else 0 end as flow6 > from samples > > There have been several messages recently about this - search on crosstab > or pivot - a couple of other options were presented. > > Frank > > ---------------------------(end of broadcast)--------------------------- > TIP 1: subscribe and unsubscribe commands go to majordomo@postgresql.org
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