Which statement is wrong about PRIMARY KEY constraint in SQL? - Study24x7
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45 followers study24x7 17 Dec 2020 10:56 AM study24x7 study24x7

Which statement is wrong about PRIMARY KEY constraint in SQL?

A

The PRIMARY KEY uniquely identifies each record in a SQL database table

B

Primary key can be made based on multiple columns

C

Primary key must be made of any single columns

D

Primary keys must contain UNIQUE values.

Databases B.SC/IT MCA
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