一个两表数据比较后的输出语句

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table1
PlanID InAmount InDate
081210001 50 2008-12-9
081210002 80 2008-12-8
081211001 20 2008-12-10
081211002 30 2008-12-11

table2
PlanID OutAmount OutDate
081210001 10 2008-12-10
081210002 40 2008-12-10
081210001 30 2008-12-11
081211001 10 2008-12-11
081210001 10 2008-12-11

result TB1
PlanID InAmount InDate
081210002 80 2008-12-8
081211001 20 2008-12-10
081211002 30 2008-12-11
说明：table2里的数量按PlanID汇总，和table1比较，输出毛table1 inAmount>table2 sum(OutAmount)的内容，table1里的数量不需要汇总，

[dawugui]

select m.* , m.InAmount - isnull((select sum(OutAmount) from table2 n where n.PlanID = m.PlanID),0) from table1 m 

[dawugui]

create table table1(PlanID   varchar(20),   InAmount int,     InDate datetime)
insert into table1 values('081210001' ,   50 ,         '2008-12-9') 
insert into table1 values('081210002' ,   80 ,         '2008-12-8') 
insert into table1 values('081211001' ,   20 ,         '2008-12-10') 
insert into table1 values('081211002' ,   30 ,         '2008-12-11') 
create table table2(PlanID   varchar(20),   OutAmount int,     OutDate datetime)
insert into table2 values('081210001' ,   10 ,           '2008-12-10') 
insert into table2 values('081210002' ,   40 ,           '2008-12-10') 
insert into table2 values('081210001' ,   30 ,           '2008-12-11') 
insert into table2 values('081211001' ,   10 ,           '2008-12-11') 
insert into table2 values('081210001' ,   10 ,           '2008-12-11') 

select PlanID ,   InAmount , InDate from
(
  select m.* , m.InAmount - isnull((select sum(OutAmount) from table2 n where n.PlanID = m.PlanID),0) val from table1 m 
) t
where val > 0

drop table table1 , table2
/*
PlanID               InAmount    InDate                                                 
-------------------- ----------- ------------------------------------------------------ 
081210002            80          2008-12-08 00:00:00.000
081211001            20          2008-12-10 00:00:00.000
081211002            30          2008-12-11 00:00:00.000

（所影响的行数为 3 行）

*/

[水族杰纶]

set nocount on
if object_id('table1')is not null drop table table1
go 
create table table1(PlanID varchar(10),      InAmount int,      InDate datetime) 
insert table1 select '081210001' ,   50 ,         '2008-12-9' 
insert table1 select '081210002' ,   80 ,         '2008-12-8' 
insert table1 select '081211001',    20 ,         '2008-12-10' 
insert table1 select '081211002',    30 ,         '2008-12-11' 
if object_id('table2')is not null drop table table2
go 
create table table2(PlanID varchar(10),    OutAmount int,       OutDate  datetime) 
insert table2 select '081210001' ,   10,            '2008-12-10' 
insert table2 select '081210002' ,   40 ,           '2008-12-10' 
insert table2 select '081210001' ,   30 ,           '2008-12-11' 
insert table2 select '081211001' ,   10 ,           '2008-12-11' 
insert table2 select '081210001',    10  ,          '2008-12-11' 
select a.* from table1 a  inner join(select PlanID,sum(OutAmount)OutAmount from table2 group by planid)b on a. InAmount>=b.OutAmount and a.planid=b.planid
/*PlanID     InAmount    InDate                                                 
---------- ----------- ------------------------------------------------------ 
081210001  50          2008-12-09 00:00:00.000
081210002  80          2008-12-08 00:00:00.000
081211001  20          2008-12-10 00:00:00.000*/

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谢谢高手