I need to learn database relation with Java,have you enybook for this?give me a Url for download ,please.

Answer 1

JDBC: http://www.tutorialspoint.com/jdbc/
JPA: https://www.tutorialspoint.com/jpa/

Answer 2

it's very useful ,thank you so much

Answer 3

I suggest you to learn JDBC at first as it is the base of database handling in Java. If you are familiar with it then you can go on JPA.