如何在 oracle 中计算工作日，不包括一周中的任何特定日期？

Posted 2023-05-09

【中文标题】如何在 oracle 中计算工作日，不包括一周中的任何特定日期？

【英文标题】：how to calculate business Day in oracle excluding any specific day of the week?

【发布时间】：2018-03-12 20:20:41

【问题描述】：

在我的数据中，我有一个开始日和结束日。我正在尝试计算这两天之间的差异。但我必须始终排除周三和周五。我仍在尝试自己找到解决方案。如果有人知道该怎么做，请提供帮助。以下是一些可用于实验的预构建代码：

SELECT
START_DATE
,END_DATE
,TRUNC(START_DATE, 'D') AS TRUNC_START
,TRUNC(END_DATE, 'D') AS TRUNC_END
,to_char(START_DATE, 'DY') AS START_DAY_NAME
,to_char(END_DATE, 'DY') AS END_DATE_NAME
,TRUNC(END_DATE) - TRUNC(START_DATE) + 1 AS TOTAL_RESOLVE_TIME
,TRUNC((TRUNC(END_DATE) - TRUNC(START_DATE) + 1)/7*2) AS NO_OF_WEEK
FROM
(
 SELECT 
 TO_DATE('2018-03-08', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-14', 'YYYY-MM-DD') AS END_DATE 
 FROM dual
 UNION ALL
 SELECT 
 TO_DATE('2018-03-09', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-15', 'YYYY-MM-DD') AS END_DATE 
 FROM dual
 UNION ALL
 SELECT 
 TO_DATE('2018-03-02', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-11', 'YYYY-MM-DD') AS END_DATE 
 FROM dual
 UNION ALL
SELECT 
 TO_DATE('2018-03-01', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-17', 'YYYY-MM-DD') AS END_DATE 
 FROM dual) a; 

【问题讨论】：

您可以在 this 的基础上计算周五和周三的数量，然后从总天数中减去

@wolfrevokcats 这真的很有帮助 非常感谢。我想我现在可以了。

【参考方案1】：

在阅读了@wolfrevokcats 提到的上述链接后，它现在可以工作了。

SELECT
START_DATE
,END_DATE
,TRUNC(START_DATE, 'D') AS TRUNC_START
,TRUNC(END_DATE, 'D') AS TRUNC_END
,to_char(START_DATE, 'DY') AS START_DAY_NAME
,to_char(END_DATE, 'DY') AS END_DATE_NAME
-- Find the difference between Resolve and Create Date
,TRUNC(END_DATE) - TRUNC(START_DATE) + 1 AS TOTAL_RESOLVE_TIME 
-- Find the number of Fridays in the whole range
,((next_day(END_date-7,'FRI')-next_day(START_DATE-1,'FRI'))/7)+1 AS NO_OF_FRI
-- Find the number of Wednesday in the whole range
,((next_day(END_date-7,'WED')-next_day(START_DATE-1,'WED'))/7)+1 AS NO_OF_WED
-- Applying the above finding the total business hours
,(TRUNC(END_DATE) - TRUNC(START_DATE) + 1)
 - (((next_day(END_date-7,'FRI')-next_day(START_DATE-1,'FRI'))/7)+1)
 - (((next_day(END_date-7,'WED')-next_day(START_DATE-1,'WED'))/7)+1) AS TOTAL_BUSINESS_HOUR
FROM
(
 SELECT 
 TO_DATE('2018-03-08', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-14', 'YYYY-MM-DD') AS END_DATE 
 FROM dual
 UNION ALL
 SELECT 
 TO_DATE('2018-03-09', 'YYYY-MM-DD') AS START_DATE 
,TO_DATE('2018-03-15', 'YYYY-MM-DD') AS END_DATE 
 FROM dual
 UNION ALL
 SELECT 
 TO_DATE('2018-03-02', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-11', 'YYYY-MM-DD') AS END_DATE 
 FROM dual
 UNION ALL
  SELECT 
 TO_DATE('2018-03-01', 'YYYY-MM-DD') AS START_DATE 
 ,TO_DATE('2018-03-17', 'YYYY-MM-DD') AS END_DATE 
 FROM dual) a;