1.

Consider the following relational query on the above database:SELECT S.snameFROM Suppliers S WHERE S.sid NOT IN (SELECT C.sidFROM Catalog CWHERE C.pid NOT IN (SELECT P.pidFROM Parts PWHERE P.color < > ‘blue’))Assume that relations corresponding to the above schema are not empty. Which of the following is the correct interpretation of the above query?

A. Find the names of all suppliers who have supplied a non-blue part
B. Find the names of all suppliers who have not supplied a non-blue part
C. Find the names of all suppliers who have supplied only blue parts
D. Find the names of all suppliers who have not supplied only blue parts
Answer» E.


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