Re: Do I just not understand count()?
От | Gregory Wood |
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Тема | Re: Do I just not understand count()? |
Дата | |
Msg-id | 003f01c1df2d$12a8f6b0$7889ffcc@comstock.com обсуждение исходный текст |
Ответ на | Do I just not understand count()? (Ben <bench@silentmedia.com>) |
Ответы |
Re: Do I just not understand count()?
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Список | pgsql-general |
I don't think I've seen that particular syntax used before (I would say select count(a) from t where a=1;), but since the query appears to work, I won't argue. Why do you think it should give you a result of 1? There are two rows containing a value of 1 for a, hence it returns 2. Greg ----- Original Message ----- From: "Ben" <bench@silentmedia.com> To: <pgsql-general@postgresql.org> Sent: Monday, April 08, 2002 2:25 PM Subject: [GENERAL] Do I just not understand count()? > 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.... > > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Don't 'kill -9' the postmaster >
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