SQL按照顺序时间段统计

借助master..spt_values表

按照时间(半小时)划分统计时间段：

select
  cast(DATEADD(MINUTE,B.number*30,dateInfo.dday) as time) StartTime,
  cast(DATEADD(SECOND,-1,DATEADD(MINUTE,(B.number+1)*30,dateInfo.dday)) as time) EndTime
from
  (select top 1 convert(varchar(10),'07:00',120)  dday) dateInfo
  cross join master..spt_values b
where b.type = 'P' and number <24  

统计时间段(半小时)范围内总数量：

with cte as
(
select
  cast(DATEADD(MINUTE,B.number*30,dateInfo.dday) as time) StartTime,
  cast(DATEADD(SECOND,-1,DATEADD(MINUTE,(B.number+1)*30,dateInfo.dday)) as time) EndTime
from
  (select top 1 convert(varchar(10),'07:00',120)  dday) dateInfo
  cross join master..spt_values b
where b.type = 'P' and number <24
)
select
  StartTime,
  EndTime,
  sum(PreSum) PreSum,
  sum(PreUsed) PreUsed
from
  (
   select StartTime,EndTime,case when hbStartTime is null then 0 else 1 end PreSum,case when Used ='' then 0 else 1 end PreUsed
   from
     cte dateInfo
     left join yshb_timetable b on cast(b.hbStartTime as time) between StartTime and EndTime
     where b.YshbID='查询条件'
  )a
group by StartTime,EndTime