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•Re: Re: Re: MySQL question

by merlyn (Sage)
on Mar 28, 2002 at 22:28 UTC ( #155138=note: print w/ replies, xml ) Need Help??


in reply to Re: Re: MySQL question
in thread MySQL question

Ahh. Then again, with a real database with subselects, that'd be:

SELECT title, doc_num, version FROM atable WHERE (doc_num, version) IN ( SELECT doc_num, MAX(version) FROM atable GROUP BY doc_num );
Again, this won't work in puny MySQL. PostgreSQL or better, baby!

-- Randal L. Schwartz, Perl hacker


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Re: •Re: Re: Re: MySQL question
by rbc (Curate) on Mar 29, 2002 at 17:10 UTC
    If Kozz cannot upgrade to PostgreSQL for some reason couldn't Kozz ape a subselect with by creating a tempory table "ttable" and then join "atable" with that? sonething like this ...
    create table ttable as SELECT doc_num, MAX(version) FROM atable GROUP BY doc_num; SELECT title, doc_num, version FROM atable a, ttable t WHERE a.doc_num = t.doc_num and a.version = t.version;

    ... I don't know about the other monks I find SQL
    fun like its a weird puzzle.

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