Consider the relational database of Figure where the primary keys are underlined. Give expressions in QBE for

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Consider the relational database of Figure where the primary keys are underlined. Give expressions in QBE for each of the following queries:

a. Find all employees who earn more than the average salary of all employees of their company.

b. Find the company that has the most employees.

c. Find the company that has the smallest payroll.

d. Find those companies whose employees earn a higher salary, on average, than the average salary at First BankCorporation.

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Database System Concepts

ISBN: 978-0072554816

4th Edition

Authors: Henry F. Korth, S. Sudarshan

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Question Posted: Jan 28, 2011 05:54 AM

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Consider the relational database of Figure where the primary keys are underlined. Give expressions in QBE for

Question:

етployee (person-mате, stret, city) works (person-naте, сompany-namе, salary) сотрану (сотрапу-пате, city) тапages (persom-пате, тапager-пате)

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a Find all employees who earn more than the average salary of all empl...View the full answer

Database System Concepts

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