Re: count of occurences
От
Eric Ridge
Тема
Re: count of occurences
Дата
Msg-id
D3ADE25911614840BC69C72E3171E4ED0FBB37@tcdiexch.tcdi.com
Список
Дерево обсуждения
Re: count of occurences "Eric Ridge" <ebr@tcdi.com>
> I tried > > select distinct job_num, (select count(*) from search_records j where > j.job_num=k.job_num) from search_records k can't you just do: select job_num, count(job_num) from search_records group by job_num order by job_num http://www.postgresql.org/idocs/index.php?queries.html#QUERIES-GROUP and creating an index on job_num might improve performace even more, but I don't know if index scans are used in aggregate functions or not. eric
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