A superkey is any key that uniquely identifies each row.
Some tables are formulated in the databases, making it easy for users to retrieve information whenever needed. A key helps to provide hints that uniquely identify rows that make up a table in the database management system. This makes it easy for the users as they interact with the database.
There are various types of keys: a super key, a foreign key, a special key, and a candidate key. A super key is one that uniquely identifies data in each row. A candidate key is a super key with no redundant attribute. A foreign key is an attribute that establishes the relationship among tables. A Primary key is a set of features uniquely identifying any table row.
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