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Define candidate key, alternate key, composite key.
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Answer Posted / sunil choudhary "hanumangarh"(
candidate key is a single key of each tuple.
alternative key is secondary key . for example(A entity
STUDENT an attribute of NAME,CLASS,ROLL.ID)the roll no is
primary key but id is alternate key.
A key formed combined of to or more columns called comosite
key.
| Is This Answer Correct ? | 88 Yes | 71 No |
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