Re: query assistance
| От | Richard Huxton |
|---|---|
| Тема | Re: query assistance |
| Дата | |
| Msg-id | 200311041543.35899.dev@archonet.com обсуждение исходный текст |
| Ответ на | query assistance (Jodi Kanter <jkanter@virginia.edu>) |
| Список | pgsql-sql |
On Tuesday 04 November 2003 15:16, Jodi Kanter wrote: > Is there a straight forward way to pull out duplicates in a particular > field given a value in another field? > For example, I have a table that lists users and study names associated > with those users. Each user can have one or more study names. My goal is > to determine if any of these people have duplicate study names. There > are duplicated study names across the system and that is ok. I just want > to see if any users have duplicate study names among their studies. Something like: SELECT created_by, study_name, count(sty_pk) FROM study GROUP BY created_by, study_name HAVING count(sty_pk) > 1; -- Richard Huxton Archonet Ltd
В списке pgsql-sql по дате отправления: