See https://www.sqlite.org/optoverview.html under section 10.0 Query Flattening
Your query is: SELECT * FROM <view> WHERE <condition> which could be treated as SELECT * FROM (view select statement) WHERE condition and then flattened. Note however that the query WILL NOT be flattened because of rule #2, the subselect in the FROM clause contains an aggregate ... > -----Original Message----- > From: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] > On Behalf Of Jens Alfke > Sent: Sunday, 16 October, 2016 12:17 > To: SQLite mailing list > Subject: Re: [sqlite] Why takes the second SELECT three times as much > time? > > > > On Oct 16, 2016, at 4:49 AM, Luuk <luu...@gmail.com> wrote: > > > > Because your second query has to build the complete view before it can > decide if a result is between the selected dates? > > I didn’t think a view had a physical manifestation that had to be built; I > thought it was just a shortcut/macro for a nested SELECT statement. > Or is the query optimizer not able to convert the nested SELECT into the > same form as the first query? > > —Jens > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
