mysql - 添加 date_add 但保留在周末中间

Question

我有一个 mysql 查询

SELECT CONCAT('document',LEFT(cases.id,26)) AS 'id',
cases.date_modified,
cases.date_modified,
'67421f0a-3f44-1093-1ab6-51750b508349' AS 'assigned_user','1','1','0',
'complete documentation in 4 Days' AS 'name',
'Not Started',
cases.date_modified,
DATE_ADD(cases.date_modified,INTERVAL 4 DAY) AS 'due date','Cases',cases.id,
'P1','Complete Operations Documentation' AS 'description'
FROM cases
    INNER JOIN cases_cstm
ON ( cases.id = cases_cstm.id_c)
WHERE cases.`assigned_user_id` = '67421f0a-3f44-1093-1ab6-51750b508349'
AND cases.`status` = 'Start Administration'
AND `cases_cstm`.`file_location` = 'Operations'
 ORDER BY `date_modified` DESC
LIMIT 1;

但问题是周二它会在周六出现，周三它会在周日出现 周四或周五人们有 2 天的时间工作？

如何检查周末是否在截止日期内增加 2 天？

问候

Answer 1

尝试这个表达式:

(case when weekday(cases.date_modified) = 0
      then DATE_ADD(cases.date_modified, INTERVAL 4 DAY)
      else DATE_ADD(cases.date_modified, INTERVAL 6 DAY)
  end) as 'due date'

它只是测试一周中的哪一天，然后添加适当的持续时间来度过周末。