Re: union query doubt:
От | Frank Bax |
---|---|
Тема | Re: union query doubt: |
Дата | |
Msg-id | 5.1.1.6.0.20021211113406.00a08510@pop6.sympatico.ca обсуждение исходный текст |
Ответ на | union query doubt: (javier garcia <andresjavier.garcia@wanadoo.es>) |
Список | pgsql-sql |
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
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