ORACLE分析函数--row_number()应用

 

    当遇到一个部门有多个员工记录，需要去取出每个部门薪水最少的那笔时，就可以用到分析函数row_number()拉 

select * from(
        select manager_id,employee_id,first_name,salary,row_number()
        over(partition by manager_id order by salary) as currowid
       from hr.employees)
 where currowid = 1