Re: how do i count() similar items

From: jackassplus <jackassplus(at)gmail(dot)com>
To: Susan Cassidy <scassidy(at)stbernard(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: how do i count() similar items
Date: 2010-09-09 00:55:56
Message-ID: AANLkTikah-3fB4fpAisWkGMw1AZ_3kuZ-MDRA3Vp6SWh@mail.gmail.com
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>
> Use a CASE statement?
>
> something like:
> select case WHEN os ~* E'^windows' then 'windows'
> WHEN os ~* E'server' then 'server'
> WHEN os ~* E'nix$' then '*nix'
> else 'other' end
> as osval, count(*) from os_tbl group by osval order by osval;
>
> The hard part is making sure your regexes cover all the bases, without
> duplication.
>
> It still sounds like the value should be a reference to a unique value in a
> small table of operating system entries, then store the value, rather than
> the string, in the main table.
>
> Susan
>

I'll give this a shot. looks like it will work well. Regexes, I don't mind,
SQL, I'm new at. Much less the pg functions.
thanks to both you and bricklin.

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