在日期之间无法在MS-SQL中工作

Question

我的数据如下，

尝试在查询下运行但返回0行， 下面的查询应返回突出显示的行数据，如上所示。

任何人都可以解释一下，我错过了什么？

select * from Flt_OperativeFlight_SchedulePeriods
where  
(
    (cast('2018-04-05' as date) between cast(ScheduleStartDate as date) and   cast(ScheduleEndDate as date) )
    or
    (cast('2018-04-11' as date) between cast(ScheduleStartDate as date) and   cast(ScheduleEndDate as date) )
) 
and CarrierCode='SQ' and FlightNumber='0004'

Answer 1

这是因为

'2018-04-05' < '2018-04-06'
and
'2018-04-11' > '2018-04-10'

作为变体，也许这就是你想要的

select * 
from Flt_OperativeFlight_SchedulePeriods 
where CarrierCode='SQ' and FlightNumber='0004' and
      (
           (ScheduleStartDate between '20180405' and '20180411')
        or (ScheduleEndDate between '20180405' and '20180411')
      )

Answer 2

你可以重写：

select * 
from Flt_OperativeFlight_SchedulePeriods 
where CarrierCode='SQ' and FlightNumber='0004' and
      (ScheduleStartDate >= '2018-04-05' and ScheduleEndDate <= '2018-04-11')

Answer 3

你可以试试这个

SELECT * 
FROM `Flt_OperativeFlight_SchedulePeriods` 
WHERE ScheduleStartDate >= '2018-04-05' AND ScheduleEndDate <= '2018-04-11' 
      AND CarrierCode='SQ' and FlightNumber='0004'

Answer 4

好像你想要重叠期，那么你需要这个逻辑：

start_1 <= end_2 and end_1 >= start_2

查询：

where  
(
    cast('2018-04-05' as date) <= cast(ScheduleEndDate as date) 
    and
    cast('2018-04-11' as date) >= cast(ScheduleStartDate as date)
) 

根据您的逻辑，您可能需要<或>