Question: queries 9. a. For each customer, what is the average weight of a package (shipment) sent by that customer? b. For each city, what is

queries

9. a. For each customer, what is the average weight of a package (shipment) sent by that customer? b. For each city, what is the maximum weight of a package sent to that city? c. For each city with population over 1 million, what is the minimum weight of a package sent to that city? d. For each city that has received at least ten packages, what is the average weight of a package sent to that city? Relational Algebra Operations 10. a. Customers who are manufacturers or have sent a package to St. Louis. b. Cities of population over 1 million which have received a 100-pound package from customer 311 . c. Trucks driven by Jake Stinson which have never delivered a shipment to Denver. PART 3 \& RELATIONAL DATABASE IMPLEMENTATION

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