Tbl has 2.4 million records and has an INTEGER PRIMARY KEY ID which is NOT NULL.
SELECT ID FROM Tbl where ID = NULL takes only a few milliseconds to run and the explain query plan shows it uses the primary key. SELECT ID FROM Tbl WHERE ID IS NULL takes around 350 milliseconds to run and the explain query plan shows it uses some covering index. I’m sure I’ve read something before about this but can’t find it in the documentation? _______________________________________________ sqlite-users mailing list firstname.lastname@example.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users