DATABASE:

QUESTION:

WILL THUMBS UP IF ALL 3 POINTS ARE ANSWERED.

(120) Consider the employee database of Fig. 1, where the primary keys are underlined. For each of the following questions, give (1) a relational algebra expression, (2) a tuple relational calculus expression, and (3) a domain relational calculus expression. Note that each problem has 15 points with 5 points for each of the three required expressions