查询删除

Question

我在数据库中有一个员工 table，它有两列 employee_card 和 ledger_month。一个员工可以与多个分类帐月份有关系。现在我想让员工保留他最高的分类帐月份，其余的将被删除。

Input:
   Employee_card      Ledger_Month

    1                111112
    1                111114
    2                111112
    2                111114


  Output :

   Employee_card      Ledger_Month

    1                111114
    2                111114

我试过这样的查询

delete from v2titas.EMPLOYEE_COPY_UPGRADED where card 
not in(select card,max(ledger_month) from v2titas.EMPLOYEE_COPY_UPGRADED  group by card)
or 
ledger_month not in (select card,max(ledger_month) from 
v2titas.EMPLOYEE_COPY_UPGRADED group by card)

但它显示这样的错误 "too many value"。我该怎么做？

Answer 1

   DELETE FROM v2titas.EMPLOYEE_COPY_UPGRADED et
WHERE EXISTS (
SELECT *
FROM v2titas.EMPLOYEE_COPY_UPGRADED  it
WHERE et.card = it.card
AND et.Ledger_Month < it.Ledger_Month    );

Answer 2

试试下面的查询..

delete from emp_test where ledger_month in (select ledger_month from emp_test e where (employee_card, ledger_month ) 不在 (select employee_card, max(ledger_month) from emp_test e1 where e.employee_card=e1.employee_card group by employee_card));

谢谢，巴拉

查询删除

Query for delete

oracle

sql-delete