what is the difference between reference key and foreign key

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Question

what is the difference between reference key and foreign key

Question Submitted By :: Uday Kumar. A

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Re: what is the difference between reference key and foreign key

Answer
# 1

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.

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Gurushant

Re: what is the difference between reference key and foreign key

Answer
# 2

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

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Brijesh Kumar Mishra

Question	Asked @	Answers
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