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Differentiate between a unique key and a primary key.
- By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
- Primary key doesn't allow NULLs however unique key allows one NULL.
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Design a gennalization and specialization hierarchy for an automobile sales company
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i want to database for online assignment submission system
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