Question

我有这个查询和结果：

SQL> select AVG(SYSDATE - DOB) AS AVERAGE_AGE_IN_DAYS
  2  FROM MORTAL;

AVERAGE_AGE_IN_DAYS
-------------------
           17877.44

有没有办法在同一个查询中将其转换为年，月和日？

Answer 1

获取可以使用months_between

的月数

SELECT select AVG(months_between(SYSDATE,DOB)) AS AVERAGE_AGE_IN_MONTHS

多年来，只需做几个月/ 12个

SELECT select AVG(months_between(SYSDATE,DOB)/12) AS AVERAGE_AGE_IN_YEARS

几个星期以来，我只会把你的结果用了几天，除以7。

您可能必须处理结果以满足您的需求，但我认为这应该涵盖它。

Answer 2

怎么样：

select 
floor(months_between(SYSDATE,DOB)/12) AS years,
trunc( months_between(SYSDATE,DOB) ) AS months, 
SYSDATE - add_months( SYSDATE, trunc(months_between(SYSDATE,DOB)) ) AS days

详细信息表明这是几年，几个月，几天。标题也说了几周，但如果你真的想要它们，我就不会。

Answer 3

也许您的查询是：

with dates as (select AVG(SYSDATE - DOB) as d --average_in_days
                 from MORTAL
              )
select trunc(d/365) as years
     , trunc((d/365 - trunc(d/365)) * 12 ) as months
     , trunc((((d/365 - trunc(d/365)) * 12) - trunc((d/365 - trunc(d/365)) * 12 )) * 4.348214) as weeks     
     , trunc(((((d/365 - trunc(d/365)) * 12) - trunc((d/365 - trunc(d/365)) * 12 )) * 4.348214
                       - trunc((((d/365 - trunc(d/365)) * 12) - trunc((d/365 - trunc(d/365)) * 12 )) * 4.348214 )
             ) * 7 
             ) as days     
from dates;

把日子变成几周，几个月，几年.ORACLE

3 个答案: