identify a suitable primary key from the table below
Answers
Answer:Why we need a Key?
Here, are reasons for using Keys in the DBMS system.
Keys help you to identify any row of data in a table. In a real-world application, a table could contain thousands of records. Moreover, the records could be duplicated. Keys ensure that you can uniquely identify a table record despite these challenges.
Allows you to establish a relationship between and identify the relation between tables
Help you to enforce identity and integrity in the relationship.
Various Keys in Database Management System
DBMS has folwing seven types of Keys each have their different functionality:
Super Key
Primary Key
Candidate Key
Alternate Key
Foreign Key
Compound Key
Composite Key
Surrogate Key
Explanation:
There is no table.
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