What is the utility of primary key in database? Write distinct feature

1.	What is the utility of primary key in database? Write distinct features of primary keys.
Answer» The primary key is used to uniquely identify the record in a database. It can be a column or a set of columns in the table. Main features of the primary key are as follows: 1. It must contain a unique value for each record of the table. 2. It does not contain null values.

What is the utility of primary key in database? Write distinct features of primary keys.

Answer»

The primary key is used to uniquely identify the record in a database. It can be a column or a set of columns in the table.

Main features of the primary key are as follows:

1. It must contain a unique value for each record of the table.

2. It does not contain null values.