如何写SQL语句？


create table tb

(

数字 int,

时间 datetime
)

insert into tb select 10, ' 2011-08-21 02:00:00.000'

insert into tb select 10, ' 2011-08-21 02:10:00.000'

insert into tb select 10, ' 2011-08-21 02:20:00.000'


insert into tb select 20, ' 2011-08-21 03:00:00.000'

insert into tb select 20, ' 2011-08-21 03:10:00.000'

insert into tb select 20, ' 2011-08-21 03:20:00.000'

--我想得到这样格式的报表，该怎样写SQL

日期 时间 数字

2011-08-21 02 30
2011-08-21 03 60

--select sum(数字)from tb where 时间 between '2011-08-21 02:00' and '2011-08-21 02:59'
drop table tb

------解决方案--------------------

SQL code

select 
max(convert(varchar(10),时间,120)) as 日期,
convert(varchar(2),时间,108) 时间,
sum(数字) 数字 
from tb
group by convert(varchar(2),时间,108)
/*
日期         时间   数字
---------- ---- -----------
2011-08-21 02   30
2011-08-21 03   60
*/