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LoginThe primary key must be
(a) Unique
(b) Not null
(c) Both Unique and Not null
(d) Either Unique or Not null
This question was addressed to me in class test.
The question is from Null Values Operations topic in chapter SQL : Queries, Constraints and Triggers of Database Management
Database Management Sql : Queries in Database Management 3 years ago
Explanation: Primary key must SATISFY unique and not null condition for sure.
Posted on 02 Dec 2021, this text provides information on Database Management related to Sql : Queries in Database Management. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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