Question: Please do questions (b) (c) (d) 1) (30 pts) Consider the following database schema: Employee-(ename, setof(Children), Address, setof(Skills)) Children scl, c2,...; Address (city, state, zipcode)

Please do questions (b) (c) (d)

1) (30 pts) Consider the following database schema: Employee-(ename, setof(Children), Address, setof(Skills)) Children scl, c2,...; Address (city, state, zipcode) Skills -s, s2 Assume that attributes of type setof(Children) and setof(Skills) have attribute names childrenSet and skillsSet. Suppose a database contains a relation emp (Employee) Now answer the following: a) b) c) d) Write a query to unnest the emp relation into flat-emp relation. Write a query to nest the relation flat-emp on the attribute for Children. Write a query to nest the relation flat-emp on the attribute for Skills. Write a query to nest the relation flat-emp on both the attributes for Children and Skills

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