Question: Consider the database schema Emp ename set of Children set

Consider the database schema Emp = (ename, set of(Children), setof(Skills)) Children = (name, Birthday) Birthday = (day, month, year) Skills = (type, set of(Exams)) Exams = (year, city) Assume that attributes of type set of(Children), set of(Skills), and setof(Exams), have attribute names ChildrenSet, SkillsSet, and ExamsSet, respectively. Suppose the database contains a relation emp (Emp).Write the following queries in SQL: 1999 (with the extensions described in this chapter).
a. Find the names of all employees who have a child who has a birthday in March.
b. Find those employees who took an examination for the skill type “typing” in the city “Dayton”.
c. List all skill types in the relation emp.

View Solution:


Sale on SolutionInn
Sales0
Views524
Comments
  • CreatedJanuary 28, 2011
  • Files Included
Post your question
5000