Give example of relational schema, Database Management System

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An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not?

If relational schema R (A, B, C) has distinct values of A including NULL values A is not a candidate key.

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Who will teach, Do you have experts of the dbms

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Synonyms and Indexes Some of the essential properties of indexes are: An Index is a schema Object Indexes can be formed explicitly or automatically Indexes are m

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