如何在mysql中使用临时表删除重复项

当Mysql表中只有一列时，如何删除重复项

如果表中有以下行

mysql> select * from EMP ;
+------+
| id   |
+------+
|   10 |
|   10 |
|   10 |
|   20 |
|   20 |
|   30 |
+------+

删除重复项后我需要行

10
20
30

我不想使用任何其他临时表。需要删除查询才能删除mysql中的重复项使用distinct

您可以使用行编号删除重复项：

with todelete as (
      select em.*, row_number() over (partition by id order by id) as seqnum
      from em
     )
delete from todelete
    where seqnum > 1;

---

提示：SELECT DISTINCT。SELECT语句用于检索。我希望从表中删除重复的ID此表中是否有唯一的列？Select语句用于检索。我想从表中删除重复的ID。您的dbms是什么@DeepthiMysql是我的dbms。

with todelete as (
      select em.*, row_number() over (partition by id order by id) as seqnum
      from em
     )
delete from todelete
    where seqnum > 1;