IF OBJECT_ID('[yjinfo]') IS NOT NULL DROP TABLE [yjinfo]
GO 
CREATE TABLE [yjinfo]([ID] INT,[uid] varchar,[fcxm1] money,[fcxm2] money,[fcxm3] money,[ffrq] datetime)
insert into [yjinfo]
select 1,'1', 3.0, 2.2, 2.23,'2012-3-1' union all   
select 2,'1', 3.1, 1.2, 2.13,'2012-3-3' union all   
select 3,'2', 3.1, 1.2, 2.13,'2012-3-6' union all   
select 4,'3', 3.1, 1.2, 2.13,'2012-4-5' union all   
select 5,'3', 3.1,1.2, 2.13,'2012-3-12' union all
select 6,'1', 1.2, 4.56, 1.11,'2012-3-14'

select [uid], ffrq=convert(varchar(7),[ffrq],120),fcxm1=sum([fcxm1]),fcxm2=sum([fcxm2]),fcxm3=sum([fcxm3]),zh=sum([fcxm1])+sum([fcxm2])+sum([fcxm3]) from [yjinfo]
group by convert(varchar(7),[ffrq],120),[uid]
order by [uid] asc

/*
(6 row(s) affected)
uid  ffrq    fcxm1                 fcxm2                 fcxm3                 zh
---- ------- --------------------- --------------------- --------------------- ---------------------
1    2012-03 7.30                  7.96                  5.47                  20.73
2    2012-03 3.10                  1.20                  2.13                  6.43
3    2012-03 3.10                  1.20                  2.13                  6.43
3    2012-04 3.10                  1.20                  2.13                  6.43

(4 row(s) affected)
*/

------解决方案--------------------
SQL code
SELECT  [uid], ffrq = CONVERT(VARCHAR(7), [ffrq], 120), fcxm1 = SUM([fcxm1]), fcxm2 = SUM([fcxm2]), fcxm3 = SUM([fcxm3]),
        zh = SUM([fcxm1]) + SUM([fcxm2]) + SUM([fcxm3])
FROM    [yjinfo]
GROUP BY CONVERT(VARCHAR(7), [ffrq], 120), [uid]
ORDER BY [uid] ASC