SQL 两个时间段 不能重复语句

DECLARE @BeginDate datetime;
DECLARE @EndDate datetime;
set @BeginDate='2015-03-2'
set @EndDate='2015-03-2'
SELECT * FROM Table
where 
(BeginDate between @BeginDate and @EndDate) or
(EndDate between @BeginDate and @EndDate) or 
(@BeginDate between BeginDate and EndDate) or 
(@EndDate between BeginDate and EndDate)              

DECLARE @BeginDate datetime;
DECLARE @EndDate datetime;
set @BeginDate='2014-03-2'
set @EndDate='2015-06-2'
SELECT * FROM Table    
where 
@BeginDate<=Date and 
Date <=@EndDate
order by Date 

第一个是时间段和时间段  

第二个是时间段和时间点