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Question

Which of the following should be used to find all the courses taught in the Fall 2009 semester but not in the Spring 2010 semester?

a.

SELECT DISTINCT course id
FROM SECTION
WHERE semester = ’Fall’ AND YEAR= 2009 AND
course id NOT IN (SELECT course id FROM SECTION WHERE semester = ’Spring’ AND YEAR= 2010);

b.

SELECT DISTINCT course_id
FROM instructor
WHERE name NOT IN (’Fall’, ’Spring’);

c.

SELECT course id
FROM SECTION
WHERE semester = 'Spring' AND YEAR= 2010);

d.

SELECT COUNT (DISTINCT ID)
FROM takes
WHERE (course id, sec id, semester, YEAR) IN (SELECT course id, sec id, semester, YEAR
FROM teaches
WHERE teaches.ID= 10101);

Answer: (a).SELECT DISTINCT course id
FROM SECTION
WHERE semester = ’Fall’ AND YEAR= 2009 AND
course id NOT IN (SELECT course id FROM SECTION WHERE semester = ’Spring’ AND YEAR= 2010);

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Q. Which of the following should be used to find all the courses taught in the Fall 2009 semester but not in the Spring 2010 semester?

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