Database Management
Accenture PrimermediumDatabase ManagementData Definition Language

Which of these are standard and best practises for SQL?

Answer options

A
Each table must have a primary key.
B
Tables should not have foreign keys.
C
NULL values should never be used.
D
All columns must have unique values.

Correct answer: Each table must have a primary key.

Explanation

Best practice mandates every table has a primary key to uniquely identify rows.

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