This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
I'm not sure which one has the best performance, but Method 1 seems superior to me in terms of maintainability. It removes the responsibility of maintaining database integrity from the application developer, so reducing the impact of application errors on the database.