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Name      Time          Num
---------------------------------
ÕÅÈý      2008-1-1      50
ÀîËÄ      2008-1-1      150
ÕÅÈý      2008-1-1      250
ÍõÎå      2008-2-1      550
ÍõÎå      2008-5-2      350
ÕÅÈý      2008-5-20    50
ÀîËÄ      2008-9-1      150
ÀîËÄ      2008-11-1    550
ÕÅÈý      2008-10-1    750
ÍõÎå      2008-12-1    150

ÏÖÔÚÏëµÃµ½µÄÊÇÈý¸öÈ˵Ä×ÜÊý£º
Name      ×ÜÊý
----------------
ÕÅÈý      1100
ÀîËÄ      850
ÍõÎå      1050

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select name,sum(Num) as total from tb group by name


¸Õ²Åд´í¡£¡£¡£²»ºÃÒâ˼£¬¸Ä¹ýÈçÏÂSQL code:

declare @tb table(name varchar(50),time datetime,Num int)
insert into @tb
select 'ÕÅÈý' ,2008-1-1,50 union all
select 'ÀîËÄ',2008-1-1,150 union all
select 'ÕÅÈý',2008-1-1 ,250 union all
select 'ÍõÎå',2008-2-1,550 uni


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