如何检查oracle中当前时间是否介于两个时间戳之间

Question

如何检查我当前的时间戳是否在时间范围之间。

ex：我想查看我当前的时间（比如说03:00 PM）是在06:00 PM到07:00 PM之间。

如何在Oracle中查看？

Answer 1

SELECT CASE
         WHEN SYSDATE - TRUNC( SYSDATE ) BETWEEN 17.5/24 AND 18.5/24
         THEN 'Is between 17:30 and 18:30'
         ELSE 'Not between 17:30 and 18:30'
       END
FROM   DUAL;

或

SELECT CASE
         WHEN SYSDATE BETWEEN TRUNC( SYSDATE ) + INTERVAL '17:30' HOUR TO MINUTE
                          AND TRUNC( SYSDATE ) + INTERVAL '18:30' HOUR TO MINUTE
         THEN 'Is between 17:30 and 18:30'
         ELSE 'Not between 17:30 and 18:30'
       END
FROM   DUAL;

Answer 2

我会使用字符串进行比较：

select
  case when to_char(sysdate, 'HH24:MI') >= '18:00' 
        and to_char(sysdate, 'HH24:MI') <  '19:00' then 'YES' else 'NO'
  end as in_time_range
from dual;