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Using database API

1 byte added, 21:15, 16 July 2021
In this case, even though person1 and person2 represent the same person, but they are distinct objects. Changing the nickname of person1 does not affect person2. The person2 object will retain the original nickname.
Changes to the object do not become permanent until the object has been committed to the database. If multiple instances exist in memory at the same time, care must be taken to make sure that data is not lost.

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