On Fri, Jul 2, 2010 at 11:15 AM, Peng Yu <pengyu...@gmail.com> wrote: > Hi, > > SELECT DISTINCT type_id FROM foods; > > If I use 'distinct', any entry that shows up greater or equal to one > time will only appear once. But I want to select an entry that appears > <=n times and only show n times if it appears more than n times. I > think that "group by" might help. But I'm not familiar with SQL enough > yet. Would you please let me know what command to use? >
Try SELECT <whatever column>, Count(type_id) FROM foods GROUP BY <whatever column> HAVING Count(type_id) < n > -- > Regards, > Peng > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- Puneet Kishor http://www.punkish.org Carbon Model http://carbonmodel.org Charter Member, Open Source Geospatial Foundation http://www.osgeo.org Science Commons Fellow, http://sciencecommons.org/about/whoweare/kishor Nelson Institute, UW-Madison http://www.nelson.wisc.edu ----------------------------------------------------------------------- Assertions are politics; backing up assertions with evidence is science ======================================================================= _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
