Primary key: A primary key is a type

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. A primary key is a column or columns in a database table with values that uniquely identify each row or record. For example, an employee ID column could be a primary key in a table of employee information. Primary keys play an important role in relational databases by reinforcing data integrity and enabling successful data retrieval. Conclusion Understanding the primary key in DBMS is foundational for anyone learning about databases. It’s not just a technical requirement; it’s a critical design principle that ensures data reliability, integrity, and efficiency. Whether you’re building your first database or just curious about how data works behind the scenes, knowing how primary keys function is a major step forward. So, the next time you create a table, remember: your primary key is the silent guardian that keeps ...