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Answer Posted / gvmahesh
transaction is a kind of physical work that is done againist
to the database by using logical operations.
this means if we want to make any changes on existing data
then we done some transactions through DML
commands(INSERT,DELETE,UPDATE)
we done any transactions all the changing data should be in
rollback segment area untill we commited that data.
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I just want to maintain data like an employee can belongs to 3 or more departments . We can resolve this by using composite key but it avoids normalization rules. So Can anyone tell me how can I maintain data.
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