Which database level is closest to the users, Database Management System

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Which database level is closest to the users?

External database level is closest to the users.

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Define tuple variable? Tuple variables are used for comparing two tuples in the same relation. The tuple variables are explained in the from clause by way of the as clause.

Advantages and disadvantages of using a database system, What are the advan...

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Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.

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