从字符串向datetime转换时失败
SQL 2005

 declare @StartDate datetime,
         @EndDate dateTime

select @tsql = @tsql + ' and a.UP_Time between ' + @StartDate + ' and ' + @EndDate

上述是时间比较的问题。编译没报错，执行就报错“从字符串向datetime转换时失败”
哪里写错了？

[解决办法]
'"++"'
[解决办法]

 DECLARE @tsql NVARCHAR(max)
 SET @tsql=''
 declare @StartDate DATETIME='2013-04-26 00:00:01', 
         @EndDate dateTime ='2013-04-26 15:00:01'
  --PRINT CONVERT(VARCHAR(30),@StartDate,120)
  --PRINT CONVERT(VARCHAR(30),@EndDate,120)

SELECT   @tsql =@tsql+ ' and a.UP_Time between ' +''''+CONVERT(VARCHAR(30),@StartDate,120)+'''' +' and ' +''''+CONVERT(VARCHAR(30),@EndDate,120)+''''
print @tsql