(a) Consider again Question 3 in Tutorial 1 (Challenge) to find the restaurants that sell all the pizzas that Maggie likes and don’t sell any pizza that Ralph likes. Write a relational algebra ...

There are two types of relational database manipulation language: procedural and assertional. A procedural language is one in which a query is expressed through a sequence of operations. This category ...

In the field of structured data computing, SQL is still the most widely used working language, not only adopted by all relational databases, but also targeted by many new big data platforms. For a ...

Abstract: Relational database systems have succeeded commercially because of their straightforwardness and well-built theoretical foundation. This paper ¿Implementation of Relational Algebra ...