Re: COUNT func
От | Bhuvan A |
---|---|
Тема | Re: COUNT func |
Дата | |
Msg-id | Pine.LNX.4.20.0110191148400.20805-100000@Larry.bks обсуждение исходный текст |
Ответ на | COUNT func (Oleg Lebedev <olebedev@waterford.org>) |
Список | pgsql-sql |
hi, try this too.. select count(*),age,status from person where age=40 and status='MARRIED' group by age,status; Regards, Bhuvaneswar. On Oct 18, Oleg Lebedev wrote: > Hi, > I am trying to count the number or rows in a table with similar field > values. I want to do it in one table scan. > In other words, say I want to count the number of rows in Person table, > having age equal to 40, and the number of rows with status as 'married'. > I want Person table to be scanned only once during this query. > So, basically I want to do the following: > SELECT COUNT(age=40), COUNT(status='married') > FROM Person; > > I tried to use aggregate functions with group by and having clauses, but > I still can't figure it out (probably because of the lack of > experience). > Please help. > Thanks, > > Oleg > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html >
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