my desktop (windows 7) SQLite version 3.8.7.4 2014-12-09 01:34:36 and explain query plan showed:
0|0|0|SCAN TABLE contact AS c USING COVERING INDEX elid2 0|1|1|SEARCH TABLE history AS h USING COVERING INDEX elid (elid=?) my linux box needs upgrade. regardless, both very slow On Thu, Jul 30, 2015 at 11:03 AM, Clemens Ladisch <clemens at ladisch.de> wrote: > James Qian Wang wrote: > > select count(*) from contact c left join history h on (h.elid=c.elid); > > Please show the output of EXPLAIN QUERY PLAN for this query. > > If it does not look like this: > 0|0|0|SCAN TABLE contact AS c USING COVERING INDEX elid2 > 0|1|1|SEARCH TABLE history AS h USING COVERING INDEX elid (elid=?) > you should get a newer SQLite version. > > > Regards, > Clemens > _______________________________________________ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > -- James Qian Wang Mobile: 44 7986 099 233
