Types of Keys in Relational Model (Candidate, Super, Primary, Alternate and Foreign)
In the context of a relational database, Keys are one of the basic requirements of a relational database model. keys are fundamental components that ensure data integrity, uniqueness, and efficient access. It is widely used to identify the tuples(rows) uniquely in the table. We also use keys to set up relations amongst various columns and tables of a relational database. Let’s explore the various types of keys used in a relational model, which are essential for organizing and querying data effectively. Why do we require Keys in a DBMS? Keys are crucial in a Database Management System (DBMS) for several reasons: Uniqueness: Keys ensure that each record in a table is unique and can be identified distinctly. Data Integrity: Keys prevent data duplication and maintain the consistency of the data. Efficient Data Retrieval: By defining relationships between tables, keys enable faster querying and better data organization. Without keys, it would be extremely difficult to manage large data...