Difference between Primary key
and composit key.
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A primary key is defined as a key or database column which uniquely identifies each row in a database table. A composite key is a set of more than one key that, together, uniquely identifies each record. ... In a well-ordered database, there should be a primary key that uniquely identifies each record.
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A primary key is a unique key used to identify the fields of a record.
A key that has more than one attributes is known as composite key. It is also known as compound key.
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