Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 22 Sep 2017 My Price 6.00

Catalog relation

Consider the following schema:

Suppliers(sid: integer, sname: string, address: string)

Parts(pid: integer, pname: string, color: string)

Catalog(sid: integer, pid: integer, cost: real)

The Catalog relation lists the prices charged for parts by Suppliers. Write the following queries in SQL:

1. Find the pnames of parts for which there is some supplier.

2. Find the snames of suppliers who supply every part.

3. Find the snames of suppliers who supply every red part.

4. Find the pnames of parts supplied by Acme Widget Suppliers and no one else.

5. Find the sids of suppliers who charge more for some part than the average cost of that part (averaged over all the suppliers who supply that part).

6. For each part, find the sname of the supplier who charges the most for that part.

7. Find the sids of suppliers who supply only red parts.

8. Find the sids of suppliers who supply a red part and a green part.

9. Find the sids of suppliers who supply a red part or a green part.

10. For every supplier that only supplies green parts, print the name of the supplier and the total number of parts that she supplies.

11. For every supplier that supplies a green part and a red part, print the name and price of the most expensive part that she supplies.

Answers

Maurice Tutor
(5)
Status NEW Posted 22 Sep 2017 09:09 PM My Price 6.00

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