Below query can be replaced by which one of the following?Select name, course_idfrom instructor, teacheswhere instructor_ID= teaches_ID;Select course_id from instructor join teaches;Select name, course_id from instructor natural join teaches;Select name ,course_id from instructor;Select name,course_id from teaches,instructor where instructor_id=course_id;
Question
Below query can be replaced by which one of the following?Select name, course_idfrom instructor, teacheswhere instructor_ID= teaches_ID;Select course_id from instructor join teaches;Select name, course_id from instructor natural join teaches;Select name ,course_id from instructor;Select name,course_id from teaches,instructor where instructor_id=course_id;
Solution
The correct replacement for the given SQL query would be:
Select name, course_id from instructor natural join teaches;
This is because the natural join operation in SQL automatically matches the columns with the same names in both tables and uses these columns as the join predicate. In this case, it would match the 'instructor_ID' in both 'instructor' and 'teaches' tables.
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