sql____001

题目：

create table my_001 (id int,value int);

insert into my_001 values(1,10):

insert into my_001 values(2,20):

insert into my_001 values(3,15):

结果

id value  sum

1 10　　10

2 20 　　30

3 15　　45

sql：select t1.id,t1.value ,sum(t2.value) from my_001 t1,join my_001 t2  on t2.id<=t1.id group by t1.id,t1.value;