How to migrate a table of a Hive database to another database

[qq]

Hello:
       How to migrate a table of a Hive database to another 
database?
       For example:
       Hive contains two databases: databaseA and 
databaseB. I want to migrate tableA in databaseA to databaseB. What do I need 
to do? Can you give me detailed steps?
       thinks.
       I am looking forward to your reply??