what is the difference between reference key and foreign key
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Answer / brijesh kumar mishra
Foreign key can hold null values but primary can not hold
null values
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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.
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