184. 部门工资最高的员工

184. 部门工资最高的员工

select 
    d.Name as Department,
    e.Name as Employee,
    e.Salary 
from 
    Employee e,Department d 
where
    e.DepartmentId=d.id 
    and
    (e.Salary,e.DepartmentId) in (select max(Salary),DepartmentId from Employee group by DepartmentId);

/* Write your T-SQL query statement below */

-- 每个部门最高
SELECT S.NAME, S.EMPLOYEE, S.SALARY
  FROM (SELECT D.NAME,
               T.NAME EMPLOYEE,
               T.SALARY,
               ROW_NUMBER() OVER(PARTITION BY T.DEPARTMENTID ORDER BY T.SALARY DESC) RN
          FROM EMPLOYEE T
          LEFT JOIN DEPARTMENT D
            ON T.DEPARTMENTID = D.ID) S
 WHERE S.RN = 1
-- 每个部门前2高
SELECT S.NAME, S.EMPLOYEE, S.SALARY
  FROM (SELECT D.NAME,
               T.NAME EMPLOYEE,
               T.SALARY,
               ROW_NUMBER() OVER(PARTITION BY T.DEPARTMENTID ORDER BY T.SALARY DESC) RN
          FROM EMPLOYEE T
          LEFT JOIN DEPARTMENT D
            ON T.DEPARTMENTID = D.ID) S
 WHERE S.RN <= 2
-- 每个部门第一第三高
SELECT S.NAME, S.EMPLOYEE, S.SALARY
  FROM (SELECT D.NAME,
               T.NAME EMPLOYEE,
               T.SALARY,
               ROW_NUMBER() OVER(PARTITION BY T.DEPARTMENTID ORDER BY T.SALARY DESC) RN
          FROM EMPLOYEE T
          LEFT JOIN DEPARTMENT D
            ON T.DEPARTMENTID = D.ID) S
 WHERE S.RN = 1 OR S.RN = 3