Alternate key is a secondary key it can be simple to understand by an example: Let’s take an example of student it can contain NAME,…

A unique key is a set of one or more than one fields/columns of a table that uniquely identify a record in a database table….

A composite key is a combination of two or more columns in a table that can be used to uniquely identify each row in the…

In the relational databases, a foreign key is a field or a column that is used to establish a link between two tables. In simple…

A column or columns is called primary key (PK) that uniquely identifies each row in the table. If you want to create a primary key,…