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Database Systems Online Tests
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MCQ 1: The operations of Natural-join are
MCQ 2: The optimizer that explores the space of all query-evaluation plans is called
MCQ 3: The process of replacement of a nested query by a query with a join is called
MCQ 4: The operations of theta-join are
MCQ 5: The two expressions generate the same set of tuples on every legal database instance, the relational expressions are said to be
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