second highest salary in postgresql code example

Example 1: FIND OUT THE NAME HIGHEST SALARY SQL

SELECT FIRST_NAME FROM EMPLOYEES
WHERE SALARY = (SELECT MAX(SALARY) FROM EMPLOYEES);

Example 2: sql highest salary by location

/*  Highest salary by Department/Location   */
SELECT e.ename, e.sal, e.deptno, d.loc
FROM emp e
JOIN dept d
ON e.deptno = d.deptno
WHERE e.sal in
( 	
  	select max(sal) 
  	from emp 
  	group by deptno
)

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