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Question

Select name, course_id
from instructor, teaches

where instructor_ID= teaches_ID;

This Query can be replaced by which one of the following ?

a.

Select name,course_id from teaches,instructor where instructor_id=course_id;

b.

Select name, course_id from instructor natural join teaches;

c.

Select name ,course_id from instructor;

d.

Select course_id from instructor join teaches;

Posted under DBMS

Answer: (b).Select name, course_id from instructor natural join teaches;

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Q. Select name, course_id from instructor, teaches where instructor_ID= teaches_ID; This Query can be replaced by which one of the following ?

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