EF 、SQL查询起止日期是否存在数据库起止日期范围

一般查询请假范围、会议室起止日期是否已存在等

一、EF  查询

query=query

.Where(a => (DateTime.Compare(Convert.ToDateTime(input.StartDate), a.StartDate) >= 0 && DateTime.Compare(Convert.ToDateTime(input.StartDate), a.EndDate) <= 0)
|| (DateTime.Compare(Convert.ToDateTime(input.EndDate), a.StartDate) >= 0 && DateTime.Compare(Convert.ToDateTime(input.EndDate), a.EndDate) <= 0)
|| (DateTime.Compare(a.StartDate, Convert.ToDateTime(input.StartDate)) >= 0 && DateTime.Compare(a.StartDate, Convert.ToDateTime(input.EndDate)) <= 0)
|| (DateTime.Compare(a.EndDate, Convert.ToDateTime(input.StartDate)) >= 0 && DateTime.Compare(a.EndDate, Convert.ToDateTime(input.EndDate)) <= 0)
);

二、SQL 查询

 ①、WHERE  ((cast(StartDate as date)  >= cast(@__input_StartDate_0 as date) AND cast(StartDate as date)<= cast(@__input_EndDate_1 as date) 
OR cast(EndDate as date) >= cast(@__input_StartDate_0 as date) AND cast(EndDate as date)<= cast(@__input_EndDate_1 as date)) 
or (cast(@__input_StartDate_0 as date) >= cast(StartDate as date) and cast(@__input_StartDate_0 as date)<= cast(EndDate as date) 
or cast(@__input_EndDate_1 as date) >= cast(StartDate as date) and cast(@__input_EndDate_1 as date)<=cast(EndDate as date)))

②、

WHERE ((cast(StartDate as date) BETWEEN cast(@__input_StartDate_0 as date) AND cast(@__input_EndDate_1 as date)
OR cast(EndDate as date) BETWEEN cast(@__input_StartDate_0 as date) AND cast(@__input_EndDate_1 as date))
or (cast(@__input_StartDate_0 as date) between cast(StartDate as date) and cast(EndDate as date)
or cast(@__input_EndDate_1 as date) between cast(StartDate as date) and cast(EndDate as date)))

 ③、

AND ( @startime BETWEEN StartDate AND EndDate
OR @endtime BETWEEN StartDate AND EndDate
OR StartDate BETWEEN @startime AND @endtime
OR EndDate BETWEEN @startime AND @endtime