It is important to remember the hint /*+ */ change the access form by database.
A- /*+ choose */
B- /*+ rule */ and others …
You can user hints in Forms 6i (Triggers, Program Units), Reports 6i (column forms, program units),
Packages, procedures and triggers of database normaly.
The hint is a important resource that you can use, but you can create index in your tables to improve the performance.
Normaly your database is default choose because oracle recomended . But remember this method
requery that run frequently statistcs.