what is the difference between reference key and foreign key

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what is the difference between reference key and foreign key..

Answer / brijesh kumar mishra

Foreign key can hold null values but primary can not hold
null values

Is This Answer Correct ?    0 Yes 1 No

what is the difference between reference key and foreign key..

Answer / gurushant

Foreing key: Suppose two table student and class both having
primary key now if primary key of student in class table
then primary key which is now contain in class table after
relationship called as foreign key.

reference key: It gives the reference of other table.

Is This Answer Correct ?    0 Yes 3 No

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