如何在SQL查询中获得两个月之间的年份以及月份和日期

Question

我需要提取年份，两个月之间的月份，例如我的输出看起来像1year 9months。我不知道如何显示这样的输出，下面是我现在使用的查询。

select round((MONTHS_BETWEEN(lease_end_date,lease_start_date)/12),1) Duration_In_Years
from lease_header

Answer 1

这样怎么样?阅读代码中的注释:

SQL> with test (date_1, date_2) as
2    -- sample dates; to test the query, modify these values
3    (select date '2021-10-20', date '2020-09-01' from dual),
4  temp as
5    -- split result of MONTHS_BETWEEN to number of years and number of months
6    (select
7       trunc(months_between(date_1, date_2) / 12) yrs,
8       round((months_between(date_1, date_2) / 12 - trunc(months_between(date_1, date_2) / 12)) * 12, 1) mon
9     from test
10    )
11  -- final result
12  select yrs || ' year(s) ' || mon || ' month(s)' result
13  from temp;
RESULT
----------------------
1 year(s) 1,6 month(s)
SQL>