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45 followers study24x7 18 Dec 2020 04:37 PM study24x7 study24x7

Difference between a primary key and a unique key?

A

 Primary key cannot be a date variable whereas unique key can be

B

Primary key can take null values but unique key cannot null values

C

You can have only one primary key whereas you can have multiple unique keys

D

None of the above

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