Ray, You can use the results of a query in a join with something like:
select tmp.id, t1.id from (some_query_selecting_id) as tmp join t1 on t1.id=tmp.id Hope that helps. Regards, Nathan Sullivan -----Original Message----- From: Ray [mailto:r...@stilltech.net] Sent: Tuesday, June 02, 2009 4:58 PM To: mysql@lists.mysql.com Subject: Re: Question about query - can this be done? On June 2, 2009 03:14:36 pm Ray wrote: > On June 2, 2009 10:44:48 am Peter Brawley wrote: > > Ray, > > > > >I want a query that will provide one record per event with all times > > > included. feel free to answer RTFM or STFW as long as you provide the > > > manual section or key words. ;) > > > > Can be done with a pivot table. Examples under "Pivot tables" at > > http://www.artfulsoftware.com/infotree/queries.php. If you get stuck, > > pipe up. > > > > PB > > Thanks Peter and Brent. > GROUP_CONCAT does exactly what I want. > Brent, you're right, I don't really want to break up the times into > separate fields that bad, the results are going into PHP so I can parse the > combined fields there without much difficulty. > > The next problem is how do I use the results in a join. My first thought > (that doesn't work) was: > > SELECT event_id, GROUP_CONCAT( CONCAT(start, '-', end) ) start_end FROM > events GROUP BY event_id JOIN event_details WHERE not sure where this typo came from ^^^^ I meant ON > events.event_id=event_details.event_id > > I have tried brackets, and a few other things, but I haven't got it yet. > Thanks, > Ray > I found a solution, but not sure if it's a good idea. CREATE OR REPLACE VIEW v AS SELECT event_id, GROUP_CONCAT( CONCAT(start, '-', end) ) start_end FROM events GROUP BY event_id; SELECT * FROM event_details JOIN v ON events.event_id=event_details.event_id Thanks, Ray > > ----- > > > > Ray wrote: > > > Hello, > > > > > > I've tried the manual and google, but I am not even sure what to call > > > what I want to do. > > > > > > simplified data example: > > > I have a table of start and end times for an event, and an id for that > > > event in a table. each event may occur multiple times, but never more > > > than 5 times and rarely more than 3. > > > I want a query that will provide one record per event with all times > > > included. feel free to answer RTFM or STFW as long as you provide the > > > manual section or key words. ;) > > > Thanks, > > > Ray > > > > > > > > > chart form follows: > > > > > > id | event_id | start | end > > > --------------------------------------- > > > 1 | 4 | t1 | t2 > > > 2 | 4 | t3 | t4 > > > 3 | 4 | t5 | t6 > > > 4 | 5 | t1 | t2 > > > 5 | 5 | t3 | t4 > > > > > > becomes > > > > > > id | event_id | start | end | start | end | start | end > > > ----------------------------------------------------------------------- > > >-- -- ? | 4 | t1 | t2 | t3 | t4 | t5 | t6 ? > > > | 5 | t1 | t2 | t3 | t4 > > > > > > > > > ----------------------------------------------------------------------- > > >- > > > > > > > > > No virus found in this incoming message. > > > Checked by AVG - www.avg.com > > > Version: 8.5.339 / Virus Database: 270.12.50/2150 - Release Date: > > > 06/02/09 06:47:00 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=nsulli...@cappex.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
