Hi Bruce, Thank you for the reply.
Just for the record the options order must be SELECT schedule_id,count(schedule_id) FROM attendance GROUP BY schedule_id HAVING count(schedule_id) <10; (swapped GROUP BY and HAVING) Best regards Nils Valentin Tokyo/Japan 2003年 7月 12日 土曜日 10:20、Bruce Feist さんは書きました: > Nils Valentin wrote: > >I would like to list all courses with have less than lets say 10 > > participants. Does anybody know how I would have to modify the code below > > to get this to work ? > > > >schedule_id is the course itself > > > > > >SELECT schedule_id,count(schedule_id) FROM attendance WHERE > >count(schedule_id)<10 GROUP BY schedule_id ; > > > >My problem is that I would need to use the count function actually within > > the WHERE (clause which is not allowed). > > That's precisely why HAVING exists. > > SELECT schedule_id,count(schedule_id) > FROM attendance > HAVING count(schedule_id) <10 > GROUP BY schedule_id ; > > Bruce Feist -- --- Valentin Nils Internet Technology E-Mail: [EMAIL PROTECTED] URL: http://www.knowd.co.jp Personal URL: http://www.knowd.co.jp/staff/nils -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
