Question 599 Identify the minimal key for relational scheme R(A, B, C, D, E) with functional dependencies F = {A → B, B → C, AC […]

Question 601 What kind of mechanism is to be taken into account for converting a weak entity set into strong entity set in entity-relationship diagram ? […]

Question 602 Which of the following is true ? I. Implementation of self-join is possible in SQL with table alias. II. Outer-join operation is basic operation […]