`active' flag or not?

Question

OK, so practically every database based application has to deal with \"non-active\" records. Either, soft-deletions or marking something as \"to be ignored\". I\'m curious a

Answer 1

Regarding indexing the boolean, why not:

ALTER TABLE users ADD INDEX index_users_on_active (id, active) ;  

Would that not improve the search?
However I don't know how much of that answer depends on the platform.