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* percentages of a column
@ 2007-06-30 02:14 Andreas <maps.on@gmx.net>
0 siblings, 1 reply; 2+ messages in thread
From: Andreas @ 2007-06-30 02:14 UTC (permalink / raw)
To: pgsql-sql
Hi,
There is a Select that calculates some SUMs of objects.
I'd like to show a list of counts and percentages of this counts based
on the sum of all counts.
Is that possible in a SELECT statement?
Example:
Fruit Count %
--------------------------
Bananas 5 10%
Apples 15 30%
Oranges 30 60%
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: percentages of a column
@ 2007-06-30 04:15 Gregory Stark <stark@enterprisedb.com>
parent: Andreas <maps.on@gmx.net>
0 siblings, 0 replies; 2+ messages in thread
From: Gregory Stark @ 2007-06-30 04:15 UTC (permalink / raw)
To: Andreas <maps.on@gmx.net>; +Cc: pgsql-sql
"Andreas" <maps.on@gmx.net> writes:
> Example:
>
> Fruit Count %
> --------------------------
> Bananas 5 10%
> Apples 15 30%
> Oranges 30 60%
select fruit_name, count(*),
round(count(*)::numeric / (select count(*) from basket) * 100, 0)::text||'%' as "%"
from basket
group by fruit_name
order by "%";
fruit_name | count | %
------------+-------+-----
Bananas | 5 | 10%
Apples | 15 | 30%
Oranges | 30 | 60%
(3 rows)
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
^ permalink raw reply [nested|flat] 2+ messages in thread
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2007-06-30 02:14 percentages of a column Andreas <maps.on@gmx.net>
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