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1.It can't maintain the database Independent sql statements.
i.e In future if there is required to change the datbase
because of maintainance problem then we need to change all
sql statements according to the new database.
2.We cant move the ResultSet object through the network bcz
it is not serialized by default.
3.It is not at all good in the transaction management.
4.Allot of problems might be happend in case of connection
closing and opening.Is is required to programmer headache
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