在SQL中使用分组方式时如何返回多个列

Question

我想要最高薪金少于50,000的雇员的名字以及他们的薪水和部门。 我有以下

SELECT department, MAX(salary) as Highest salary
FROM employees
GROUP BY department
HAVING MAX(salary) < 50000

如何获得要退回的员工的姓名？

Answer 1

很近...

SELECT department, name, MAX(salary) as Highest salary
FROM employees
GROUP BY department, name
HAVING MAX(salary) < 50000

评论更新后

SELECT name, department , salary
FROM employees e
   JOIN
  (
    SELECT department as dept, MAX(salary) as HighestSalary
    FROM employees
    GROUP BY department
  ) MaxE ON e.department = MaxE.dept AND e.salary = MaxE.HighestSalary

Answer 2

除非我对要求有误解，否则只需将员工添加到选择/分组依据？

SELECT employee, department, MAX(salary) as Highest salary
FROM employees
GROUP BY employee, department
HAVING MAX(salary) < 50000