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Explain primary and Foreign keys?

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Explain primary and Foreign keys?

Posted by Amritvir Singh 6 years, 7 months ago

CBSE > Class 10 > Computer Applications (165)

1 answers

Pratibha K 6 years, 7 months ago

Primary key is a value that differentiate one decode from all other decodes. A table can have only one primary key. A primary key cannot contain a non-value and a dublicate value. Foreign key are common fields in transection table used to establish a relation between master and transection table.

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