[Koha] exporting and importing database?

[Ernst Lustig]

Hello list :-)
I've got a question:

We have quite small a library with two branches. There is no  
internet-connection in any of the sites where the computers are.
So, the idea (my idea) is, to export the database of branch A, put the  
data on CD/Disk, and import that into the database of branch B (and vice  
versa), maybe once a week or month.
Can anyone tell me how that is done? I guess it should work with some  
MySQL commands?
Hope I'm not annoying anyone by asking mysql-questions :-/
So for any ideas, thanks in advance,

Stefan Gesing
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