mysql - 将 SELECT 语句更改为 DELETE

Question

在我的表中有很多重复的行。我有一个 SELECT 提供我要删除的数据，但我该怎么做？无论我尝试什么，都会出错。

SELECT *
  FROM tablename t
 WHERE NOT EXISTS (         
              SELECT 1
                FROM tablename t2
               WHERE t2.column = t.column
              HAVING COUNT(*) = 1
                     )

Answer 1

只需将 'SELECT *' 更改为 'DELETE'

DELETE 
FROM tablename t
WHERE NOT EXISTS (         
              SELECT 1
              FROM tablename t2
              WHERE t2.column = t.column
              HAVING COUNT(*) = 1
              )