How to migrate A database data to database B

Hello world

I have 1 year of work, now I want to transfer data from database A to B data database (database B is including structure only) but the database A and B have some differences between the tables.

some tables have less column and some more.second question is the B database structure may be normalized (resulting for more tables) in the database, one all fields are stored in the same table.

How can I migrate the data from database A to B?

Thank you

The entire table with the same structure with datapump expport and import. The table that aren't the same struture with link of database and "insert into"table B"in select...;

Tags: Database

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