Great, thanks Simon. Just how fast will my Select be? Will it be order(n) with the number of records being returned?
Thanks, Ian On 22/09/2010 12:32, Simon Slavin wrote: > On 22 Sep 2010, at 11:22am, Ian Hardingham wrote: > >> I have the following table: >> >> infPlayTable (id INTEGER PRIMARY KEY AUTOINCREMENT, infId INTEGER, name >> TEXT NOT NULL UNIQUE, score REAL) >> >> I often need to do the following: >> >> SELECT name, score FROM infPlayTable WHERE infId = 670 ORDER BY score DESC >> >> What is the syntax for the index I need to create on InfPlayTable to >> have that be quick? > CREATE INDEX infScore ON infPlayTable (infld,score DESC) > > looks up the right records quickly. Making the following index > > CREATE INDEX infScoreName ON infPlayTable (infld,score DESC,name) > > instead may make your application run faster due to how SQLite works > internally. > > Simon. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
