Well, 5.x accepted the query. It's been running for awhile, now, so I'll find out later if it did what I need.
>-----Original Message----- >From: Peter Brawley [mailto:[EMAIL PROTECTED] >Sent: Wednesday, October 08, 2008 5:25 PM >To: Jerry Schwartz; mysql@lists.mysql.com >Subject: Re: Finding gaps > >>I must be missing something obvious; or does this not work in 4.1.22? > >Looks like a 4.1.22 bug. > >PB > >Jerry Schwartz wrote: >> I'm finally getting back to this issue, and I've read the bits on >> artfulsoftware. The example >> >> SELECT >> a.id+1 AS 'Missing From', >> MIN(b.id) - 1 AS 'To' >> FROM tbl AS a, tbl AS b >> WHERE a.id < b.id >> GROUP BY a.id >> HAVING a.id < MIN(b.id) - 1; >> >> Looks like exactly what I want. However, when I try it (prod is my >tbl, >> prod_num is my id) I get >> >> mysql> select a.prod_num + 1 AS `Missing From`, >> -> MIN(b.prod_num - 1) AS `To` >> -> from prod as a, prod as b >> -> where a.prod_num < b.prod_num >> -> group by a.prod_num >> -> having a.prod_num < min(b.prod_num) -1 ; >> ERROR 1054 (42S22): Unknown column 'a.prod_num' in 'having clause' >> >> I must be missing something obvious; or does this not work in 4.1.22? >> >> Regards, >> >> Jerry Schwartz >> The Infoshop by Global Information Incorporated >> 195 Farmington Ave. >> Farmington, CT 06032 >> >> 860.674.8796 / FAX: 860.674.8341 >> >> www.the-infoshop.com >> www.giiexpress.com >> www.etudes-marche.com >> >> >>> -----Original Message----- >>> From: Peter Brawley [mailto:[EMAIL PROTECTED] >>> Sent: Wednesday, September 17, 2008 5:26 PM >>> To: Stut; mysql@lists.mysql.com >>> Subject: Re: Finding gaps >>> >>> >>>> Is there any elegant way of finding the gaps? >>>> >>> You'll find some ideas under (and near) "Find missing numbers in a >>> sequence" at http://www.artfulsoftware.com/infotree/queries.php. >>> >>> PB >>> >>> ----- >>> >>> Stut wrote: >>> >>>> On 17 Sep 2008, at 22:12, Jerry Schwartz wrote: >>>> >>>>> I have records that should be sequentially (not auto-increment) >>>>> numbered, >>>>> but there are gaps. Is there any elegant way of finding the gaps? >>>>> >>>> Why do they need to be sequential? When this requirement comes up >it's >>>> usually for illogical reasons. >>>> >>>> -Stut >>>> >>>> -------------------------------------------------------------------- >-- >>>> >>> -- >>> >>>> No virus found in this incoming message. >>>> Checked by AVG - http://www.avg.com >>>> Version: 8.0.169 / Virus Database: 270.6.21/1677 - Release Date: >>>> >>> 9/17/2008 5:07 PM >>> >>>> >> >> >> >> ---------------------------------------------------------------------- >-- >> >> >> No virus found in this incoming message. >> Checked by AVG - http://www.avg.com >> Version: 8.0.173 / Virus Database: 270.7.6/1713 - Release Date: >10/7/2008 6:40 PM >> >> -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
