done //my attempt not working
SELECT *
FROM Placement, Internship
WHERE Placement.i_code=Internship.code
WHERE Student.f_id <> Internship.f_id
[INNER JOIN and LEFT JOIN cannot be used]
Relationship table:
![Relationship table][1]
Is this what you need?
SELECT Student.*
FROM Student, Placement, InterShip
WHERE Placement.i_code=Internship.code
AND Placement.s_code=Student.id
AND Student.f_id <> Internship.f_id
BTW: Why don't you want to use Joins?
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