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SELECT Stu.id, Stu.Name, Pck.Salary as Stu_Salary, Fri.Friend_ID , Pck2.Salary as Fri_Salary
FROM Students as Stu
INNER JOIN Friends as Fri
ON Stu.id = Fri.ID
INNER JOIN Packages as Pck
ON Stu.id = Pck.ID
INNER JOIN Packages as Pck2
ON Fri.Friend_ID = Pck2.ID)
SELECT Name
FROM CTE
WHERE Fri_Salary>Stu_Salary
ORDER BY Fri_Salary ASC
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Placements
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WITH CTE AS(
SELECT Stu.id, Stu.Name, Pck.Salary as Stu_Salary, Fri.Friend_ID , Pck2.Salary as Fri_Salary
FROM Students as Stu INNER JOIN Friends as Fri ON Stu.id = Fri.ID INNER JOIN Packages as Pck ON Stu.id = Pck.ID INNER JOIN Packages as Pck2 ON Fri.Friend_ID = Pck2.ID)
SELECT Name FROM CTE WHERE Fri_Salary>Stu_Salary ORDER BY Fri_Salary ASC