Doing a EXPLAIN on the SELECT statement it is using "Using where; Using temporary; Using filesort" with 14000 rows of data. How best to improve this; when I already have indexed on id and type
On Thu, Nov 22, 2012 at 4:46 PM, Michael Dykman <mdyk...@gmail.com> wrote: > Assuming that (id,type) is unique in the source data, that is a pretty > elegant method: > > > select id from > > (select distinct id, count(*) > > from my_table > > where type in (2,5) > > group by id > > having count(*) = 2)a; > > > > -- > - michael dykman > - mdyk...@gmail.com > > May the Source be with you. > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql > >
