Question

Consider the employee database of Figure. Give expressions in QBE, and Datalog for each of the following queries:
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 the names, street addresses, and cities of residence of all employees who work for First Bank Corporation and earn more than $10,000 per annum.
d. Find all employees who live in the same city as the company for which they work is located.
e. Find all employees who live in the same city and on the same street as their managers.
f. Find all employees in the database who do not work for First Bank Corporation.
g. Find all employees who earnmore than every employee of Small Bank Corporation.
h. Assume that the companies may be located in several cities. Find all companies located in every city in which Small Bank Corporation islocated.



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  • CreatedJanuary 28, 2011
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