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Purpose of a primary key
easy
5 pts · first answer counts
data-modelling
sql
Purpose of a primary key
What is the main job of a primary key in a relational table?
Choose one answer
A.
It makes the table load faster when the server starts
B.
It links the table to a table in another database
C.
It uniquely identifies each row and cannot be NULL
D.
It encrypts the most important column in the table
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