ORACLE SQL Running TOTAL and daytotal using window function

Question

From the EMPLOYEE table, I want to group the amount of records(employees hired) AND also have the running TOTAL per day. The format of the input is like this:

row         


        

Answer 1

select trunc(hire_date), 
       count(*) over (partition by trunc(hire_date)) as hired_per_day,
       count(*) over (order by hire_date) as total_number_of_employees
from employee
order by trunc(hire_date)