# KIỂM TRA TÀI KHOẢN CÓ LỖI TRÊN DULIEUKETOAN

## 1. Kiểm tra

* Tài khoản không tồn tại
* Tài khoản hạch toán vào cấp mẹ

```sql
// Some code
select  t1.tkno,t2.ma, t2.ten
from 
(select tkno from vr group by tkno)T1
full outer join
(select * from taikhoan) t2 
on t1.tkno = t2.ma
where 
t2.ma is null  -- tài khoản không tồn tại trên danh mục tài khoản
or (t2.Cap=1 and t2.ma = t1.TKNO) -- tài khoản hạch toán vào mã mẹ
--or t1.TKNO is null
order by t1.tkno
```


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