What is primary key in RDBMS ?

Answer 1

Example : employee ID is is the primary key of Employee record. It means the employee ID is unique from one employee to other because the names of employees can be same but their IDs or registration number can never be same. So the primary key of employees record will be the ID field

Answer 2

this is a constraint for the column of a table.the primary key constraint ensures that the column cannot be bull and that the values in the column will be unique

Answer 3

@Jagriti Tiwary
You questioned and you only answered 😃😃😃 #lol