I know understand. Thank you ;)
On 2/2/06, Richard Huxton <dev@archonet.com> wrote:
> Silas Justiniano wrote:
> > Sorry, I'll remake (rewrite? redo? ... bad English :/ ) my question:
> >
> > I have Books, Authors and Intermediate table. At intermediate I'm
> > currently using the following indexes:
> >
> > CREATE INDEX authorIndex ON Intermediate(author_id);
> > CREATE INDEX bookIndex ON Intermediate(book_id);
> >
> > I need a third index to not allow duplicated data in my table:
> >
> > CREATE UNIQUE INDEX blablabla ON Intermediate(author_id, book_id);
> >
> > I'd like to know if, using the third index I can delete one of the
> > first. Maybe both?
>
> You can probably delete authorIndex without impacting performance too much.
>
> --
> Richard Huxton
> Archonet Ltd
>
--
Silas Justiniano - Brazil