Java, how to change current database to another?

Question

I have a Java program connection to a MySQL database, how can I change the current database to a different one on the same connection?

I connect to MySQL like this:<

Answer 1

You can prefix the database name on your table names like this.

For example: db1 has table1 and db2 has table2

select * from db1.table1, db2.table2;

This will allow you to do cross database queries