Oracle Database Discussions

Hi, friends,

I have one question: how to change the data owner from UserA to UserB?

My sceneria is like this:

I created a user, say UserA, and UserA is the ower of tablespace tsA.
UserA has loaded some data into the tablespace. When I view the tables of tablespace tsA, it is like this: UserA.table1, etc.

Now, I created a user, say UserB, and I want UserB to be the owner of the
tablespace tsA. But I still say the table under tablespace as: UserA.table1.
How can change the owner of tablspace tsA to UserB and I can safely delete UserA?

Thanks,

Xiannian