Question

Which of the following attributes can be considered as a choice for primary key.​

Answer 1

Answer:

Hope it helps you

Answer 2

Id attribute can be considered as a choice for primary key.

Explanation:

• The attributes street, name, and department can repeat for some tuples.  

• But the Id attribute has to be exclusive. Therefore, it forms a primary key.

• A primary key is also called a primary keyword.

• It is a key in a relational database that is exclusive to each record.  

• A relational database should always have only one primary key.