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In this guide, you will learn about primary key in DBMS with the help of examples. We will discuss, what is a primary key , how it is different from other keys in DBMS such as foreign key and unique key . What is a Primary Key A primary key is a minimal set of attributes (columns) Primary Key : A primary key is a type of key that contains a column or set of columns in a table that uniquely identifies each row in the table. The primary key is an attribute or a set of attributes that help to uniquely identify the tuples (records) in the relational table. Learn about the difference between Primary Key and Foreign Key and how they work together to maintain integrity in efficient database design. Discover tips for using, examples and free templates. Learn how to use the SQL PRIMARY KEY constraint to create a unique identifier for each row in a table. See syntax, examples, and default names for different database systems.
