试图找出所有员工的平均就业时间

Question

将它四舍五入到最近的一年。

GKGameSessionEventListener

到目前为止，我已经能够计算出月数。

我正在使用12c

Answer 1

如果你想要平均值，那么你需要聚合：

select avg(months_between(sysdate, start_date) ) as avg_months
from job_history;

如果你想要它多年：

select round(avg(months_between(sysdate, start_date))/12) as avg_years
from job_history;

Answer 2

这就是它的样子

SELECT AVG(DATEDIFF(year,start_date, end_date)) AS AverageLengthOfEmployment from job_history

Answer 3

试试这个：

SELECT 
  employee_id
, AVG(CAST( months_between(start_date, sysdate) / 12 AS INTEGER) AS avg_work_years
FROM job_history