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Difference between usage of PersistenceContext and PersistenceUnit ?

 
Prabhat Kumar N
Greenhorn
Posts: 20
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Hi there,
For starters what is the difference between using PersistenceContext and PersistenceUnit ? Also, please check out the following and tell the difference between them.

1.


and

2.


and

3.


and

4.



Please assist as soon as possible. Thanks
 
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