This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You dont have any control over the format the Timestamp is kept in the database. You can set the date time to what ever you want when you put it in of course . You can also control how you want to format it when you get a timestamp out of the database and display or print it somewhere.