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What is primary key? |
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Key that wont have any duplicates (no repitititon of data) means ?
a relational table uniquely identifies each record in the table,which is mainly used to avoid data redundancy.
Example: Social Security Number in a table with not more than one record per person.
It may consist of a single attribute or multiple attributes in combination.
Annapurna
First answer by ID0999310988. Last edit by Nettey 05. Contributor trust: 0 [recommend contributor]. Question popularity: 4 [recommend question]
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