如何通过SELECT显示SQL的工作年限？

Question

SELECT LAST_NAME,DEPARTMENT_ID, ROUND(MONTHS_BETWEEN (SYSDATE, hire_date)) MONTHS_WORKED
FROM   EMPLOYEES 
WHERE DEPARTMENT_ID = 90
ORDER BY MONTHS_WORKED;

此选择是针对Oracle中的“ HR”数据库！问题是如何使它显示出工作的年份和月份！先感谢您！！ ：）

Answer 1

我们可以基于您当前的months_between尝试。我们可以将结果除以12以得到年数。模（即余数）表示月份数：

select 
    last_name,
    department_id, 
    floor(months_between(sysdate, hire_date)/12) years_worked,
    floor(mod(months_between(sysdate, hire_date), 12)) months_worked
from employees 
where department_id = 90
order by years_worked, months_worked;