employee(employee-id, employee-name, street, city)

works(employee-id, company-id, salary)

company(company-id, company-name, city)

manages(employee-id, manager-id)

Figure 2. Employee database

Note: For each tuple of the manages relation, the manager-id is the managers employee id.

Q. Consider the employee database of Fig. 2, where the primary keys are underlined. Given an SQL query for each of the following questions.

a. Find the names of all employees who work for First Bank Corporation.

b. Find the names and cities of residence of all employees who work for First Bank Corporation.

c. Find all employees in the database who live in the same cities as the companies for which they work.