First max salary in sql

SELECT first-name
FROM employees
WHERE salary = (SELECT MAX(salary) FROM employees);

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
)

Second max salary in sql

SELECT MAX(SALARY) 'SECOND_MAX' FROM EMPLOYEES
WHERE SALARY <> (SELECT MAX(SALARY) FROM EMPLOYEES);

How to get employee having maximum experience in mysql

select max(salary), dept_id from employee where salary not in(select max(salary) from employee) group by dept_id;

Source: codeproject.com

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