> But this doesn't show anything that count more than n times. I want > the type_id shows up more than n times in the database only appear n > times in the result of the query.
That's some exotic requirements you've got there. Is it possible to elaborate them? Probably your best solution is not in SQL but in your programming language. Because I believe it's possible to do that in SQL but the performance of such query would be awful. Pavel On Fri, Jul 2, 2010 at 12:29 PM, Peng Yu <pengyu...@gmail.com> wrote: > On Fri, Jul 2, 2010 at 11:19 AM, P Kishor <punk.k...@gmail.com> wrote: >> On Fri, Jul 2, 2010 at 11:19 AM, P Kishor <punk.k...@gmail.com> wrote: >>> 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 >> >> make that >> >> HAVING Count(type_id) <= n > > But this doesn't show anything that count more than n times. I want > the type_id shows up more than n times in the database only appear n > times in the result of the query. > > > -- > Regards, > Peng > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
