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what is primary key,unique key, foreign key? can u teach me
in simple language?
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Answer Posted / kavita ahuja
primary key is an attribute or set of attribute of a table
that uniquely identified each record whereas foreign key is
the attribute that is used to create relation between two
tables.and the values for foreign key must match with the
values of primary key to which it refers.
| Is This Answer Correct ? | 21 Yes | 12 No |
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