Just rebuild all the indexes in the database.  If you don't care about down time you can just do a ALTER INDEX ALL on every table in the DB.

Really whichever one works and whichever one makes more sense for the specific problem you're trying to solve and the tools that are available.  In some cases loading all the...

Why?  Sometimes we either want to authenticate without being tied to our AD login, for example this is particularly useful when trying to test out permissions.  In some cases we...

If you know ID is a sequential int that should be pretty straight forward.

SELECT MAX(ID), EMAIL, MAX(LAST_UPDATED_DT) FROM wherever GROUP BY EMAIL

That seems like extreme over regulation, why shouldn't the answer to that request have to be anything more than "The same information you gave us"  That might not apply to...

How big are the databases?

Just because there's an identity column in the database doesn't mean they have to use it in their data model.  If they want to use an external system to keep...

Have you tried it on any distros other than redhat?  Or is that all that's supported?