Import data from another db

Hi team,
I want to import my data from another database. I wondering that what’s i need to know about db structure?
Is there any document for me.

Here are few things you should answer before any answer.

  1. Another DB is same ,mysql?
  2. Another DB is on same machine?
  3. Both DB is SuiteCRM DB?
  4. Both DB SuiteCRM version is same?
  5. Both DB mysql version is same?