Which key is a unique key?

What is unique key example?

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. You can say that it is little like primary key but it can accept only one null value and it cannot have duplicate values.

Is unique key a primary key?

A unique key is a group of one or more than one fields or columns of a table which uniquely identify database record. A unique key is the same as a primary key, but it can accept one null value for a table column. It also cannot contain identical values.

Which key is unique in the record?

A primary key is used to uniquely identify each record in the table.

Is there any name for unique keys?

Unique Keys Another name for a unique key is unique constraint. To ensure rows are unique within a database, use a unique constraint.