You accept an IT internship at a local charity. The charity wants you to help them with compliance and auditing requirements.
You need to ensure that a column or combination of columns uniquely identifies each row of a table.
Which constraint should you define?
A. Primary key
B. Secondary key
C. Foreign key
D. Default key
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Inside “A TABLE” or one table, which identifies a unique record is the primary key.
The anwer is A
Correct answer is A.