Re: Re: Restriction by grouping problem.
От | Philip Warner |
---|---|
Тема | Re: Re: Restriction by grouping problem. |
Дата | |
Msg-id | 3.0.5.32.20010727175049.030efa30@mail.rhyme.com.au обсуждение исходный текст |
Ответ на | Re: Re: Restriction by grouping problem. (Philip Warner <pjw@rhyme.com.au>) |
Список | pgsql-sql |
At 11:47 27/07/01 +1000, Philip Warner wrote: > >...the FROM statement would be a lot nicer if your had a table of SIDs, or >at least had a good way of generating the list of SIDs. > A final (& possibly best) option, is: Select MDT.GETFILE, [anything else from 'best' record] From (Select Distinct SID From LOGS) as S, (Select* From LOGS L Where L.SID = S.SID Order By DATETIME Asc Limit 1) as MDT But unfortunately PG 7.1 does not allow this - the second select can not reference the first select. I have not tried it in 7.1.2. ---------------------------------------------------------------- Philip Warner | __---_____ Albatross Consulting Pty. Ltd. |----/ - \ (A.B.N. 75 008 659 498) | /(@) ______---_ Tel: (+61) 0500 83 82 81 | _________ \ Fax: (+61) 0500 83 82 82 | ___________ | Http://www.rhyme.com.au | / \| | --________-- PGP key available upon request, | / and from pgp5.ai.mit.edu:11371 |/
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