From: | "Joel Burton" <joel(at)joelburton(dot)com> |
---|---|
To: | "Robert Wynter" <rgwynter(at)rci(dot)rogers(dot)com>, <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: union query format |
Date: | 2002-04-26 21:32:14 |
Message-ID: | JGEPJNMCKODMDHGOBKDNIEHBCLAA.joel@joelburton.com |
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Lists: | pgsql-sql |
> Hi I'm trying to combine 3 query's in a union query as follows:
>
> rowdate nco nca nch aht asa svl
> %abandon
>
> With Query 1;
>
> 04/01/02 1000 500 500 450 23 .23 .50
> 04/02/02 2000 500 1500 450 23 .23 .50
>
> plus Query 2;
>
> wtd 3000 1000 2000 450 23 .23 .50
>
> and Query 3;
>
> mtd 3000 1000 2000 450 23 .23 .50
>
>
> I have 2 problems once the Union Query has run.
> 1. because Query 2 & 3 are text, it's forcing Query 1 into text and the
> date order is all messed up.
> 2. I need to formate the fileds for svl & % abandon as a percentage.
Something like:
SELECT rowdate AS sort, rowdate::text, nco, ..., asa * 100 || '%' FROM
query1
UNION
SELECT 'infinity'::timestamp, rowdate, ... FROM query2
UNION
SELECT 'infinity'::timestamp, rowdate, ... FROM query2
ORDER BY 1
This will let you sort by the first column as dates (keeping wtd and mtd at
the end).
To show a number as percentage, x * 100 appended with '%' works fine. See
to_char() if you need more control.
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