Question

我有一张这样的表

CustomerId     serviceID             from                           To
id1           serv1          '2016-01-01 07:22:33'       '2016-01-05 07:22:33'
id1           serv1          '2016-02-21 08:30:10'       '2016-02-27 08:30:10'
id1           serv2          '2016-02-15 18:30:10'       '2016-02-15 19:30:10'
id1           serv3          '2016-02-19 18:30:10'       '2016-02-19 19:30:10'
id1           serv4          '2017-01-01 08:30:10'       '2017-01-01 09:00:10'

其中：

 serv1 = "in Dog Hospital"
 serv2 = "X ray service"
 serv3 = "Recovering meal"

对于报告，我需要找到所有那些暗示＆＃34; dog＆＃34;在＃34; Dog医院接受了这项服务＆＃34;即狗在狗医院时所服用的那些服务＆＃34;。有什么建议吗？

Answer 1

你可以检查行，而不是像serv1这样的句号：

select *
from t a
where exists (
    select 1
    from t b
    where serviceId = 'serv1'
    and a.`from` >= b.`from`
    and a.`to` <= b.`to`
);

查找满足表中存在的某些日期约束的行

1 个答案:

Demo @ SQLFiddle