//按月查詢
select
*
from
tb
where
convert
(
varchar
(7),
date
,120) =
'2011-05'
select
*
from
tb
where
convert
(
varchar(10)
,
date
,120) =
'2011-05-01'
//按小時分組，求得每個分組后的個數
SELECT datepart(hour,a.VelPassTime),count(*) num from VelOriginalData a
where a.SensorCommonId = 'f7fb8929-1e58-42c1-9d13-052ddfc82136' and a.VelPassTime >= '2020-04-13 00:00:00' and a.VelPassTime <= '2020-04-14 00:00:00'
and a.VelLoad >= 0 and a.VelLoad <= 10000
group by datepart(hour,a.VelPassTime)