advice on using Postgresql

Hi,

My boss is asking me to developp an application which uses a database and Java.

The application is going to be sold in a CDROM.

Therefore, the system must include an auto installation procedure, and must use the adequate system.

Can I use postgressql for this Purpose ?

Is Postgresql better than mysql for this application ?

If yes, what are the licensing conditions ? (we don't want to share the sources of some parts of our application)

Thanks by advance for your answer

Best regards,

Anncath