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CREATE TABLE SalaryTable ( dept_id INTEGER, name VARCHAR(50), salary INTEGER ); INSERT INTO SalaryTable (dept_id,name,salary) VALUES (12,'a',100), (13,'b',200), (12,'c',300), (14,'d',400), (12,'e',500), (13,'f',600);
6 rows affected
select s.* from SalaryTable s where not exists ( select 1 from SalaryTable where dept_id = s.dept_id and salary > s.salary ) order by s.dept_id
dept_id
name
salary
12
e
500
13
f
600
14
d
400