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what is candidate key & primary key,different b/t the two?
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Answer Posted / naz
A Candidate Key can be any column or a combination of
columns that can qualify as unique key in database. There
can be multiple Candidate Keys in one table. Each Candidate
Key can qualify as Primary Key.
A primary key is the column that uniquely identifies a
record. A primary key should be UNIQUE and never be NULL.
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