在MYSQL服务器中查找重复项并删除它们

我有许多重复的名字，我需要找到并删除它们。 我只想保存usedpoints的最高值，并删除usedpoints值较低的重复项

MYSQL表示例：

==============================
| name | points | usedpoints |
|----------------------------|
| john | 840    | 1200       |
| john | 230    | 900        |
| jane | 550    | 400        |
| jane | 130    | 245        |
| nick | 130    | 123        |
| nick | 90     | 200        |
==============================

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1如果要保留id值最低的行：

DELETE n1 FROM names n1, names n2 WHERE n1.id > n2.id AND n1.name = n2.name

DELETE n1 FROM names n1, names n2 WHERE n1.id < n2.id AND n1.name = n2.name

2如果要保留id值最高的行：

DELETE n1 FROM names n1, names n2 WHERE n1.id > n2.id AND n1.name = n2.name

DELETE n1 FROM names n1, names n2 WHERE n1.id < n2.id AND n1.name = n2.name

---

您可以使用任何其他字段代替id。

您可以使用行编号删除重复项

;with cte as (
    Select *
          ,RN = Row_Number() over (Partition By Name Order by usedpoints Desc)
     From  YourTable
)
--Delete from cte where RN>1
Select * from cte where RN>1   -- << Remove is satisfied

我认为表名是test。 最后一条select语句实际上是编写delete语句的地方

select o.name, oc.dupeCount, o.usedpoints from MyTable o inner join ( SELECT name, COUNT(*) AS dupeCount FROM MyTable GROUP BY name HAVING COUNT(*) > 1 ) oc on o.name = oc.name

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我要用它来查找重复项，但现在我需要删除它们。

您是在Sql Server还是mysql中执行此操作的？标签与标题不匹配。抱歉，mysql editedI不明白。。从MyTable中删除名称检查此项：