Re: Count Total on a limited query?
От | Wei Weng |
---|---|
Тема | Re: Count Total on a limited query? |
Дата | |
Msg-id | 20020116103654.0c47424a.wweng@kencast.com обсуждение исходный текст |
Ответ на | Count Total on a limited query? ("Koen Antonissen" <Koen@Cee-Kay.net>) |
Список | pgsql-sql |
I don't think an extra count query is that much of a work to the system. A counting on the indexed column is very fast. On Wed, 16 Jan 2002 13:55:18 +0100 "Koen Antonissen" <Koen@Cee-Kay.net> wrote: > Hi group, > > I've implemented a couple of search queries, to prevent too many results > transferring/getting displayed I use a LIMIT. Now I would like to > display the total numbers found on the query (discarding the limit). > > Is this possible in a nice manner? > I thought up the following: > 1. Implementing the limit system in PHP > Con: Too much work for something this elementary > 2. Executing an extra search query which only counts > Con: An extra query which feels unnecessary > 3. Using a subselect which only counts > Con: although it gives a nice result, and isn't much work, the query > will be executed for each record and therefore not an option. > > > I hope this can be done using PostgreSQL. > > Thank you, > Koen Antonissen > > ---------------------------(end of broadcast)--------------------------- > TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org) > -- Wei Weng Network Software Engineer KenCast Inc.
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