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Unformatted text preview: sids such that the supplier with the first sid charges more for some part than the supplier with the second sid. 9. Find the pids of parts supplied by at least two different suppliers. 10. Find the pids of the most expensive parts supplied by suppliers named Yosemite Sham. Exercise 3 (Relational Calculi) [20pts] Consider the following database schema: EMPLOYEE (emp_name, address_street, address_city, phone_no) DEPARTMENT (dept_name, mgr_name, mgr_start_date) WORKS_ON (emp_name, industry_name, salary) INDUSTRY (industry_name,...
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