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waht is the difference between primary key and super key?
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Answer Posted / sweety singh
superkey is a set of attributes that can uniquely identify
individual tuples whereas a key or a primary key is a
minimal super key that can identify individual tuples.
ex..eno pno hrs
1 1 2
2 4 7
i.e...here eno,pno,hrs together are a superkey but eno,pno
is primary key and hence eno,pno cant hav null values and
repeated enteries....
| Is This Answer Correct ? | 8 Yes | 3 No |
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