I have read every article on SYNCHRONIZE and I have one hopefully easy ques

Hi,
All my updating/deleting/inserting is done in session beans. My question is with updating. When i update database record, does the method have to be synchronized or not.
Isnt it true that it is not possible to lock a record twice? If a record is being updated, isnt is automatically locked?
Say to users sign in as JOE. One user changes his last name to BLOW and the other user signed in as JOE changes his last name to DOE. Both users press update at the exact same time. Well there is no exact time right? Whatever one hits the method last, get his last name in the file, in the end anyhow.
Since all my beans are in session, isnt it already threadsafe?
Thanks for your time and I hope that I am making sense.
P.S. - I am using oracle database just in case that can help.
Adam

Say to users sign in as JOE. One user changes his last
name to BLOW and the other user signed in as JOE
changes his last name to DOE. Both users press update
at the exact same time. Well there is no exact time
right? Whatever one hits the method last, get his last
name in the file, in the end anyhow.Yes, this is true.
Since all my beans are in session, isnt it already
threadsafe?I don't know if your beans are threadsafe, but let's assume they are. All that means is that the end result will be consistent. If A updates the database and then B updates the database, the end result will be what B did and not something else. It doesn't matter whether the updates were 10 minutes apart or 10 microseconds apart. "Threadsafe" has nothing to do with record locking; threadsafe just ensures that the Java processing doesn't mix the result of two threads. Database record locking is a different issue entirely, so you may have to start reading articles about that next.

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