Re: Problem writing sql statement.... - Mailing list pgsql-general

From Bjørn T Johansen
Subject Re: Problem writing sql statement....
Date
Msg-id 20070216084421.1c49f48a@foxhound
Whole thread Raw
In response to Re: Problem writing sql statement....  (Ron Johnson <ron.l.johnson@cox.net>)
Responses Re: Problem writing sql statement....  (Ron Johnson <ron.l.johnson@cox.net>)
List pgsql-general
Not exactly what I want... I don't know the date or id, I just need to find all rows that have the same date
and the same id..


BTJ

On Thu, 15 Feb 2007 16:46:21 -0600
Ron Johnson <ron.l.johnson@cox.net> wrote:

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> On 02/15/07 15:13, Bjørn T Johansen wrote:
> > I have a table that I want to find rows that have the same value
> > in two fields, e.g. all rows that have the same date and also the
> >  same productionid... How do I write such an sql statement?
>
> If I understand your question:
>
> SELECT FIELD_1, FIELD_2, COUNT(*)
> FROM A_TABLE
> WHERE SOME_DATE = 'yyyy-mm-dd'
>   AND PRODUCTIONID = nnnn
> GROUP BY FIELD_1, FIELD_2
> HAVING COUNT(*) > 1;
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> TIP 6: explain analyze is your friend


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