Re: Left Outer Join Question
От | Edward Murray |
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Тема | Re: Left Outer Join Question |
Дата | |
Msg-id | a5htb0$1n81$1@jupiter.hub.org обсуждение исходный текст |
Ответ на | Re: Left Outer Join Question (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-sql |
On Wed, 27 Feb 2002 16:59:23 +1100, Tom Lane wrote: > "Christopher Kings-Lynne" <chriskl@familyhealth.com.au> writes: >> What's probably happening is that count isn't counting NULLs? > > As per spec. If you want to count records independently of whether any > particular column is NULL or not, use count(*). See the docs, notably > http://www.ca.postgresql.org/users-lounge/docs/7.2/postgres/sql-expressions.html#SYNTAX-AGGREGATES I think the problem is that the rows are not being returned by the query at all not that any particular column is null. Do I need to perform another outer join? I am not sure how to tackle this problem. > regards, tom lane > > ---------------------------(end of broadcast)--------------------------- > TIP 1: subscribe and unsubscribe commands go to majordomo@postgresql.org
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