--- "Leyne, Sean" <Sean@...> wrote: > Consider, A table with every person in the world: > - it also not have an index for Country (China + India = 25% of database)
Hi! ...but in that case, wouldn't you have a FK to the country table? Do you mean that in such case we should avoid the use of the index doing something like select * from persons where id_country = :id or 1 = 1 Sorry If I didn't get your idea correctly! -s
