select count(point_id) as today_sum from point where datediff(d,point_date,getdate())=0
关键语句：
datediff(d,point_date,getdate())=0
mssql中得到当天数据的语句
一条例子：
select count(point_id) as today_sum from point where datediff(d,point_date,getdate())=0
关键语句：
datediff(d,point_date,getdate())=0
select count(point_id) as today_sum from point where datediff(d,point_date,getdate())=0
关键语句：
datediff(d,point_date,getdate())=0