Question: Using the following relational schema for a COMPANY example, write down the relational algebra expressions for each of the following queries 1. Return the name

Using the following relational schema for a COMPANY example, write down the relational algebra expressions for each of the following queries

Using the following relational schema for a COMPANY example, write down the

1. Return the name of the projects that are in 'Houston'

2. Return the name of the departments that has a project in 'Houston'

3. The SSN of the employees who (a) do not have any dependents but (b) supervise an employee that works on a project in 'Houston'

EMPLOYEE Fname Minit Lname Ssn Bdate Address Sex Salary Super_ssn Dno DEPARTMENT Dname Dnumber Mgr_ssn Mgr_start_date DEPT_LOCATIONS Dnumber Dlocation PROJECT Pname Pnumber Plocation Dnum WORKS ON Essn Pno Hours DEPENDENT Essn Dependent_name Sex Bdate Relationship

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