Krish,
It depends on how many tables you have, if the tables in DB1 and DB2 have
the same structure, whether you want to append data from DB1 to DB2 or just
copy the tables.
You can import tables from DB1 into DB2 if the tables are to be exactly the
same using the File -> Get External Data menu option.
You can even use cut and paste if the table structures are the same.
If you want to append data from DB1 to DB2 then you can link the tables from
DB1 to DB2 and use an Append query. (You will have to join the tables to do
this if some data is already in DB2.) This allows you to copy some or all
of the fields.
You can automate this process using VBA code if there are many tables.