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Define candidate key, alternate key, composite key.
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Answer Posted / swapna
A candidate key is one that can identify each row of a
table uniquely. Generally a candidate key becomes the
primary key of the table. If the table has more than one
candidate key, one of them will become the primary key, and
the rest are called alternate keys.
A key formed by combining at least two or more columns is
called composite key.
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