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Lily Brooks——Studied at Columbia University, Lives in New York City. Experienced marketer currently working for a global advertising agency.
Candidate Key -C 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.
Primary Key -C A
Primary Key is a column or a combination of columns that uniquely identify a record.
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