Sql Oracle-日期时间上的条件

我正在处理这个数据库，它包含工厂中的车间订单信息。我使用这个查询来检索订单数据，使用截止日期作为条件。它提取两周内关闭的订单

select order.id, order.end_date, material.id, material.description
from plant.order inner join plant.material
on order.material = material.id
where order.end_date <= to_date('26/10/2018 06:00:00', 'DD/MM/YYYY HH24:MI:SS') 
where order.end_date <= to_date('12/10/2018 06:00:00', 'DD/MM/YYYY HH24:MI:SS') 

在这种情况下，订单id 1的日期应为2018年10月25日，而订单id 2的日期应为2018年10月26日

我希望我已经说清楚了

---

谢谢

您只需使用

TRUNC（order.end\u date-6/24）

---

当

    select 
       order.id, 
       order.end_date, 
       material.id, 
       material.description,
       case when TO_CHAR (order.end_date, 'HH24:MI:SS')<'06:00:00' then order.end_date- interval '1' day else order.end_date end as workday
    from plant.order inner join plant.material,
    on order.material = material.id
    where order.end_date <= to_date('26/10/2018 06:00:00', 'DD/MM/YYYY HH24:MI:SS') 
    where order.end_date <= to_date('12/10/2018 06:00:00', 'DD/MM/YYYY HH24:MI:SS') 

选择
订单号，
订单结束日期，
材料id，
材料说明，
案例何时显示字符（order.end\u日期'HH24:MI:SS'）
WITH t AS (
   SELECT TO_DATE('26/10/2018 05:00' , 'dd/mm/yyyy hh24:mi') AS end_date FROM dual
   UNION ALL SELECT TO_DATE('26/10/2018 07:00' , 'dd/mm/yyyy hh24:mi') AS end_date FROM dual)
SELECT end_date, TRUNC(end_date - 6/24)
from t;


+----------------------------------------+
|END_DATE           |TRUNC(END_DATE-6/24)|
+----------------------------------------+
|26.10.2018 05:00:00|25.10.2018          |
|26.10.2018 07:00:00|26.10.2018          |
+----------------------------------------+

    select 
       order.id, 
       order.end_date, 
       material.id, 
       material.description,
       case when TO_CHAR (order.end_date, 'HH24:MI:SS')<'06:00:00' then order.end_date- interval '1' day else order.end_date end as workday
    from plant.order inner join plant.material,
    on order.material = material.id
    where order.end_date <= to_date('26/10/2018 06:00:00', 'DD/MM/YYYY HH24:MI:SS') 
    where order.end_date <= to_date('12/10/2018 06:00:00', 'DD/MM/YYYY HH24:MI:SS')