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From: hari.fuchs@gmail.com
To: pgsql-sql@postgresql.org
Subject: Re: Table results format - should I use crosstab? If so, how?
Date: Wed, 19 Mar 2014 18:56:58 +0100
Message-ID: <87wqfqrs0l.fsf@hf.protecting.net> (raw)
References: <DUB115-W1332BA00C05AAEF44DA982FD57F0@phx.gbl>
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Jennifer Mackown <niftyshellsuit@outlook.com> writes:

> Hi, 
> I have a problem with getting a table to display in the way I want it to. It's one of those things that looks so simple I should be able to do it in 5 minutes, but I've been working on it all afternoon and I'm getting nowhere!!
> What I have is the following:
> Date               Firstday    Lastday2014/03/12        1                12014/03/18        1                02014/03/19        0                12014/03/21        1                1
>
> And what I need to see is this:
> Firstday             Lastday2014/03/12       2013/03/122014/03/18       2013/03/192014/03/21       2013/03/21
>
>
> Can anyone help?

WITH tmp (id, firstday, lastday) AS (
  SELECT row_number() OVER (PARTITION BY t1.date ORDER BY t2.date),
         t1.date, t2.date
  FROM tbl t1
  JOIN tbl t2 ON t2.date >= t1.date
    AND t2.lastday = 1
  WHERE t1.firstday = 1
)
SELECT id, firstday, lastday
FROM tmp
WHERE id = 1
ORDER BY firstday, lastday



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  Subject: Re: Table results format - should I use crosstab? If so, how?
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