r the following schema: Suppliers (sid: integer, sname: string, address: string) Parts (pid: integer, pname: string, color: string) Catalog (sid: integer, pid: integer, cost: real) sid is the key for Suppliers, pid is the key for Parts, and sid and pid together form the key for Catalog. The Catalog relation lists the prices charged for parts by Suppliers. Write the SQL queries for t
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)
sid is the key for Suppliers, pid is the key for Parts, and sid and pid together form the key for Catalog. The Catalog relation lists the prices charged for parts by Suppliers.
Write the SQL queries for the following:
(a) Find the names of suppliers who supply some red part.
(b) Find the sids of suppliers who supply some red or green part.
(c) Find the sids of suppliers who supply some red part or are at 221 Packer Ave.
(d) Find the sids of suppliers who supply some red part and some green part.
(e) Find the sids of suppliers who supply every part.
(f) Find the sids of suppliers who supply every red part.
(g) Find the sids of suppliers who supply every red or green part.
(h) Find the sids of suppliers who supply every red part or supply every green part.
(i) Find pairs of sids such that the supplier with the first sid charges more for some part than the supplier with the second sid.
(j) Find the pids of parts that are supplied by at least two different suppliers.
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