SQL查询预订日期从和到

Question

寻找基于起始日期和截止日期返回数据的 sql 查询。

桌子 ：

id - int
carid int,
bookingStartDate - datetime
bookingEndDate - datetime

在这里，我尝试测试的所有以下查询都无法重新调整预期结果

示例 1：

set @startdate='2019-12-21'
set @enddate='2019-12-22'

--Example 1
select  id,bookingStartDate,bookingEndDate from orders
where  
(bookingStartDate between @startdate  and @enddate
and bookingEndDate between @startdate and @enddate)


--Example 2
select  id,bookingStartDate,bookingEndDate from orders
where 
status=4 and 
(bookingStartDate >=@startdate and bookingEndDate <= @enddate)

--Example 3
select  id,bookingStartDate,bookingEndDate from orders
where 
(bookingStartDate <= @startdate  and bookingEndDate >= @startdate)
or 
(bookingStartDate <= @enddate and bookingEndDate >= @enddate)

要求是，根据起始日期和今天检查列表所有可用汽车

Answer 1

这是重叠范围问题，您的查询应如下所示：

SELECT id, bookingStartDate, bookingEndDate
FROM orders
WHERE
    @startdate < bookingEndDate AND
    @enddate   > bookingStartDate;

这将找到能够包含由@startdate到@enddate定义的日期范围的所有可用预订。