Re: Comments on subquery performance
| От | Richard Huxton |
|---|---|
| Тема | Re: Comments on subquery performance |
| Дата | |
| Msg-id | 4214ED42.5040802@archonet.com обсуждение исходный текст |
| Ответ на | Comments on subquery performance ("T- Bone" <jbowen333@hotmail.com>) |
| Ответы |
Re: Comments on subquery performance
|
| Список | pgsql-sql |
T- Bone wrote: > (second attempt in two days to post this message...I appologise if for > some reason a duplicate appears) > > Hello all, > > I created a query that contains two subqueries and joins and would like > some feedback on whether: > 1) this approach is logical; and, > 2) if this is an optimal approach (performance wise) to return the > records I seek. Well you could just do: SELECT l.*, c1.catname, c2.catname, c3.catname FROM tbl_listing l, tbl_categories c1, tbl_categories c2, tbl_categories c3 WHERE l.catid1 = c1.catid AND l.catid2 = c2.catid AND l.catid3 = c3.catid -- Richard Huxton Archonet Ltd
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