MicroStation V8i Key-in: difference between DBCONMGR and ACTIVE DATABASE?

Hi Experts,

When I attempted to connect to Oracle database, I tried two different Key-in commands

-- DBCONMGR Oracle username/password@dbserver

-- ACTIVE DATABASE username/password@dbserver

Seems to me they both work. Anybody know what is the difference (outcomes, dependencies, etc.) between these two commands?

I believe there must be some difference on some aspect, such as the outcome, and their dependencies. Otherwise MicroStation doesn't need to provide two different ways.

Thank you!

Sui