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

The following query will omit duplicate values

SELECT DEPTNO, MAX(SAL) FROM EMP GROUP BY DEPTNO;

The following query will include the duplicate values

SELECT * FROM EMP WHERE (DEPTNO,SAL) IN 
( SELECT DEPTNO, MAX(SAL) FROM EMP GROUP BY DEPTNO)