mysql - 如何检查 CURTIME() 是否在两个不同时间之间？

Question

我正在尝试使用 MySQL 进行时间检查，以查看当前时间是否介于 2 个给定时间戳之间。

我想做的是，如果设置的通知范围在 2 个给定时间戳之间，则生成一个通知列表。

因此，如果有人说在“18:00:01”和“07:59:59”之间通过 TXT 消息通知我，那么在“18:00:01”和“07:59:59”之间通过电子邮件通知我。

这是我所做的。

所以我尝试了以下(假设当前时间是 17:00:00)

SELECT CURTIME() BETWEEN '08:00:00' AND '18:00:00' //this retured 1 which is correct

但是，如果我尝试以下操作(假设当前时间是 19:00:00)

SELECT CURTIME() BETWEEN '18:00:01' AND '07:59:59'  //this return 0

这是我当前的查询

 SELECT DISTINCT
TRIM(su.first_name) AS name,
CASE WHEN n.notification_method = "SMS" THEN 
CASE WHEN cc.gateway IS NOT NULL THEN CONCAT(su.phone_cell, cc.gateway) ELSE "" END
ELSE su.email1 END AS address
FROM  ticketing_system_notifications AS n
INNER JOIN(
SELECT DISTINCT created_by, issue_id FROM ticketing_system_discussions
WHERE status = 1
) AS ds ON n.notify = ds.created_by
INNER JOIN users AS su ON su.user_id = n.notify
LEFT JOIN cell_phone_carriers AS cc ON cc.carrier_id = su.carrier_id
WHERE ds.issue_id = 31 AND n.notify <> 12 AND n.notification_type = "REPLY"
AND n.category_id = 0 AND n.status = 1 AND (n.expired_on IS NULL OR n.expired_on > NOW() ) 

AND (  (n.start IS NULL OR n.end IS NULL) OR (  

CASE WHEN n.start <= n.end THEN
CURTIME() BETWEEN n.start AND n.end
ELSE
CURTIME() >= n.start AND CURTIME() <= n.end
END   )  ) 

这是我错的地方

CASE WHEN n.start <= n.end THEN
CURTIME() BETWEEN n.start AND n.end
ELSE
CURTIME() >= n.start AND CURTIME() <= n.end
END   )

有人可以帮我构建正确捕获时间的逻辑吗？start 和 end 字段都是 TIME

类型

在我的 ticketing_system_notifications 表中，我有以下 2 条记录
1) start = '08:00:00' end = '18:00:00' TEXT
2) 开始 = '17:59:59' 结束 = '07:59:59'

Answer 1

如果时间范围超过午夜，您应该改用此逻辑:

 curtime() >= n.start OR curtime() <= n.end

想一想:当前时间必须在“开始”和午夜之间，或者在午夜和“结束”之间。