Thank you Simon. As you said, UNIQUE(b, i) is redundant, but I guess it will not affect the performance of the SELECT.
I find "SEARCH TABLE t1 USING INDEX sqlite_autoindex_t1_1 (b>?)" when I use EXPLAIN QUERY PLAN, so I do not need to add any index, right? Um, I guess I have nothing to do to improve the performance. Thanks. -- Sent from: http://sqlite.1065341.n5.nabble.com/ _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
