Select EMP with max SAL from each DEPT

Question

I´m having a bad time with a SQL query. I´m using oracle default tables:

\'EMP\' TABLE

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AND

Answer 1

You can also use the analytical RANK() function:

SELECT * FROM (
  SELECT
    Dept.DeptNo,
    Dept.DName,
    Emp.EName,
    Emp.Sal,
    RANK() OVER (PARTITION BY Dept.DeptNo ORDER BY Emp.Sal DESC) AS DeptSalRank
  FROM Emp
  INNER JOIN Dept ON Emp.DeptNo = Dept.DeptNo
)
WHERE DeptSalRank = 1