MSSQL 判断一个时间段是否在另一个时间段内!

 1 CREATE TABLE #B

 (

    MeetingRoom int,

    BeginTime datetime,

    EndTime datetime

 )

 insert into #B

 select 1,'2012-05-24 10:00:00','2012-05-24 16:00:00'

 DECLARE @BeignTime datetime --查询开始时间

 DECLARE @EndTime datetime --查询结束时间

 DECLARE @MeetingRoom INT --查询的会议室

 SET @BeignTime='2012-05-24 00:00:00'

 SET @EndTime='2012-05-24 17:00:00'

 SET @MeetingRoom=1

 SELECT @BeignTime=DATEADD(SECOND,1,@BeignTime)     --解决结束时间和开始时间相同的冲突

 SELECT CASE WHEN COUNT(1)>0 THEN '已占用' ELSE '未占用' END FROM #B WHERE

 (@BeignTime BETWEEN BeginTime AND EndTime OR

  @EndTime BETWEEN BeginTime AND EndTime OR

  BeginTime BETWEEN @BeignTime AND @EndTime OR

  EndTime BETWEEN @BeignTime AND @EndTime) AND MeetingRoom=@MeetingRoom

 DROP TABLE #B