• Super Key:- This key recognizes the row in the table.
  • Primary Key:-This key is a column in the table which recognizes each row in the same table uniquely
  • Candidate Key:-This key does not have any repeated attribute
  • Foreign Key:-This key a column in the table to create a relationship with another table.

This particular RDBMS Question explains the importance of keys in the database.

BY Best Interview Question ON 17 Feb 2019