Question

我的表

create table tbl_trial_balance
(
    ID int primary key,
    Name char(20) not null,
    Parent_code int references tbl_trial_balance(ID), -- Self Join
    Debit float,
    Credit float
)
go

INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(1,'Assets',null,null,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(2,'Current Assets',1,null,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(3,'Bank Account',2,null,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(4,'DBBL A/C',3,5000,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(5,'DBBL A/C',3,4000,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(6,'DBBL A/C',3,3000,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(7,'DBBL A/C',3,null,7000);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(8,'IFIC A/C',3,3000,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(9,'IFIC A/C',3,5000,null);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(10,'IFIC A/C',3,null,6000);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(11,'IFIC A/C',3,null,9000);
INSERT INTO tbl_trial_balance (ID,Name,Parent_code,Debit,Credit) values(112,'IFIC A/C',3,null,8000);
go

我想对特定节点的所有子节点的值求和。例如，对于我期望的顶级Assets音符：

Name       Debit          Credit
Assets    20000          30000

对于第二级Current Asset节点，我希望：

Name             Debit         Credit
Current Asset    20000          30000

我不能用简单的GROUP BY来做到这一点：

select 
    Name,
    SUM(Debit),
    SUM(Credit)
FROM tbl_trial_balance
GROUP BY Name

如何做到这一点？

Answer 1

好的，如果所需的输出是一个拼写错误，那么你可以使用它：

class LibFormatter(ManagedFile):
    def simple_parameter(self, param, value):
        self.file.write('{}: {}\n'.format(param, value))

with LibFormatter('library.txt', 'w') as lib:
    ... # etc

如何计算分层表上子值的总和？

1 个答案: