Discuss the characteristics of relations that make them different from ordi- nary tables and files.
Define the following terms as they apply to the relational model of data: domain, attribute, n-tuple, relation schema, relation state, degree of a rela- tion, relational database schema, and relational database state. Why are tuples in a relation not ordered? Why are duplicate tuples not allowed in a relation? What is the difference between a […]