What is primary and foreign key?

1.	What is primary and foreign key?
Answer» Answer: a PRIMARY KEY refers to a key in a RELATIONAL database that is unique for each record it is a unique identifier where as a FOREIGN key is a column or group of columns in a relational database table that PROVIDES a link between data in two tables. Explanation:

Answer»

Answer: a PRIMARY KEY refers to a key in a RELATIONAL database that is unique for each record it is a unique identifier where as a FOREIGN key is a column or group of columns in a relational database table that PROVIDES a link between data in two tables.

Explanation:

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What is primary and foreign key?

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