Tuple Relational Calculus

Tuple Relational Calculus (TRC) is a formal language used to describe what data we want to retrieve from a database. It focuses on specifying conditions that individual records (tuples) must satisfy rather than how to find them. Think of it as a way to express queries by describing the properties of desired data, such as "Find all employees where the department is 'Sales'." TRC emphasizes what to select rather than how, providing a precise, logical method to specify database queries without detailing the execution process.