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)))
原文地址:http://www.cnblogs.com/liaer/p/16910828.html