关于时间段的求和
求一天数据和，如下
icd tm x
1300 2012-06-04 22:00:00.00057.84 50
1300 2012-06-04 22:05:00.00057.84 50
1300 2012-06-04 22:10:00.00057.84 50
1300 2012-06-04 22:15:00.00057.84 50
1311 2012-06-04 22:20:00.00057.84 50
1311 2012-06-04 22:25:00.00057.84 50
1311 2012-06-04 22:30:00.00057.84 50
1311 2012-06-04 22:35:00.00057.84 50


输出
icd tm_day sum_x
1300 2012-06-04 200
1311 2012-06-04 200

谢谢！

[解决办法]
create table tb(icd int,tm datetime,y decimal(10,2),x int)
insert into tb select 1300,'2012-06-04 22:00:00.000',57.84,50
insert into tb select 1300,'2012-06-04 22:05:00.000',57.84,50
insert into tb select 1300,'2012-06-04 22:10:00.000',57.84,50
insert into tb select 1300,'2012-06-04 22:15:00.000',57.84,50
insert into tb select 1311,'2012-06-04 22:20:00.000',57.84,50
insert into tb select 1311,'2012-06-04 22:25:00.000',57.84,50
insert into tb select 1311,'2012-06-04 22:30:00.000',57.84,50
insert into tb select 1311,'2012-06-04 22:35:00.000',57.84,50
go
select icd,convert(varchar(10),tm,120) as tm_day,sum(x) sum_x
from tb
group by icd,convert(varchar(10),tm,120)
/*
icd tm_day sum_x
----------- ---------- -----------

1300 2012-06-04 200
1311 2012-06-04 200

(2 行受影响)

*/
go
drop table tb