Re: Select/Group by/Order by question

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От Mike Nolan
Тема Re: Select/Group by/Order by question
Дата
Msg-id 200404090623.i396NTjP022301@gw.tssi.com
обсуждение исходный текст
Ответ на Re: Select/Group by/Order by question  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-general
> You are grouping/ordering by the textual result of to_char(),
> in which PM naturally follows AM.  I think the behavior you
> want would come from grouping/ordering by the underlying
> timestamp column "mtrantime".

Well, I need it grouped by hour, but that led me to the solution:

select to_char(date_trunc('hour',mtrantime),'mm-dd hh AM') as
datetime, count(*) as tot, from memtran
group by mtranoper, date_trunc('hour',mtrantime)
order by mtranoper, date_trunc('hour',mtrantime)

I knew there had to be a straight-forward solution.  Thanks Tom.
--
Mike Nolan

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