baxy77bax <b...@hi.htnet.hr> wrote: > i need some help to see if i understood the point about indexing. > > if i have 2 tables. each table has 2 columns. and now i want to join > those tables through one column in each table: > > example > T1 > C1 C2 >> > +--+ > | > T2 | > C1 C2 > > let say the columns in question are C1(t1) and C2(t2) > first question: > can i create index X1 in both columns C1(t1) and C2(t2) ?
No. But you can of course create two indexes, one on T1(C1) and another on T2(C2). Though you would only need one of them to speed up the join. > and what is the > actual gain when i create indexes. The same you get from an index printed at the end of a textbook: it allows you to quickly look up a term and jump to the right page. Igor Tandetnik _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
