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Actually in update you want a key that matches one that is already used. Because you are updating, not inserting.
You need the key to match one that exists so you know which record to update.
So there is no such thing as a DuplicateKeyException in update.
Nick Lee
Nick Lee
You could use the customers Social Security number.
Nick Lee
The Sun Certified Java Developer Exam with J2SE 5: paper version from Amazon, PDF from Apress, Online reference: Books 24x7 Personal blog
The hill is not a hill.
The hill is not a hill.
Originally posted by Chan Huan:
I got a same assignment. I think the confusion is what is key. through having analysed the instruction and business model, the key may be consist of name and location field.
The hill is not a hill.
The hill is not a hill.
Originally posted by Larry Lee:
TQ, I'm not quite agree with it.
I think a hotel with two same room is possible.
Yes, a room number is the best identity, but without it, a room can still be booked, when a customer comes, the waiter takes him to one of these rooms randomly. Looks strange, but possible.
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