Re: Do I just not understand count()?

From: "Nigel J(dot) Andrews" <nandrews(at)investsystems(dot)co(dot)uk>
To: PostgreSQL-General <pgsql-general(at)postgresql(dot)org>
Subject: Re: Do I just not understand count()?
Date: 2002-04-08 19:05:27
Message-ID: Pine.LNX.4.21.0204082003050.2690-100000@ponder.fairway2k.co.uk
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Perhaps it would clear up things for those more expert on SQL [and it's
variations across DBs] than I if you could say on what system you would
normally do this.

> > That's what I'd normally do to, but in this case I want to run a query
> > more like
> >
> > select count(a=1), count(a=2) from t
> >
> > > > If I have the table t defined as:
> > > >
> > > > a
> > > > ---
> > > > 1
> > > > 1
> > > > 2
> > > >
> > > >
> > > > and I say:
> > > >
> > > > select count(a=1) from t;
> > > >
> > > > should it give me 1 or 2 as a result? I'm getting 2, and I'd think I
> > > > should get 1....
> > > >

--
Nigel J. Andrews
Director

---
Logictree Systems Limited
Computer Consultants

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