有点不明白:
insert into tb values('A',123.32,'2007-1-1')
insert into tb values('A',112.34,'2007-1-1')
insert into tb values('A',101.36,'2007-1-1')
insert into tb values('B',90.38,'2007-1-1')
insert into tb values('B',79.4,'2007-1-2')
insert into tb values('C',68.42,'2007-1-2')
insert into tb values('C',234.56,'2007-1-2')
insert into tb values('D',400.7,'2007-2-5')
insert into tb values('D',566.84,'2007-2-6')
insert into tb values('A',34.56,'2007-2-6')
insert into tb values('A',356.77,'2007-2-7')
中的收费金额要输入吗?可共有200多万条记录啊,非常感谢!