What are the 7 types of keys?

What are the different types of keys?

Primary Key. The primary key refers to a column or a set of columns of a table that helps us identify all the records uniquely present in that table. ... Super Key. ... Candidate Key. ... Alternate Key. ... Foreign Key. ... Composite Key. ... Unique Key.

What are the 5 types of primary key?

Primary Key.Candidate Key.Alternate Key.Super Key.Composite Key.Foreign Key.Unique Key.

What is key explain its type with example?

A Key is a data item that exclusively identifies a record. In other words, key is a set of column(s) that is used to uniquely identify the record in a table.

What are the two types of keys?

Types of KeysSkeleton Key. Also known as a passkey, a skeleton key is a simple key with a cylindrical shaft and a single toothed end, which is used to open warded locks. ... Abloy Key. The Abloy key is used on disc tumbler locks. ... Dimple Key. ... Paracentric Key. ... Tubular Key. ... Keycard.