DELETE 的目标表 Result 不可更新。如何解决？

Question

我尝试使用 CTE 和子查询，它们都给出了与“DELETE 的目标表结果不可更新”相同的错误。我尝试了谷歌，但没有找到有用的资源。

customers table

CTE 代码

with Result as
(
    select 
        *,
        row_number() over(partition by id order by id) as RowNo 
    from 
        customers
)
delete from Result 
where RowNo > 1;

子查询代码

delete Result 
from (select *, row_number() over(partition by id order by id) as RowNo 
      from customers) Result 
where Result.RowNo > 1; 

Answer 1

图案：

DELETE t1
FROM table t1
JOIN table t2 ON t1.ident_column = t2.ident_column
             AND t1.order_column < t2.order_column

或

DELETE
FROM table t1
WHERE EXISTS ( SELECT NULL 
               FROM table t2
               WHERE t1.ident_column = t2.ident_column
                 AND t1.order_column < t2.order_column )

此模式删除与ident_column 重复的行，仅将order_column 中具有最大值的行保存为组。