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Question

In database management, what is a 'foreign key'?

A A key used to encrypt sensitive database fields so as to prevent unauthorized data access

B A key that uniquely identifies each row in the same table

C A key that can accept NULL and duplicate values within its own table only

D A key used exclusively for indexing purposes to speed up queries

E A column (or set of columns) in one table that references the primary key of another table

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Central Bank of India SO

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