在Oracle SQL中删除重复的行

Question

我已使用此代码选择重复的行，它正确了，

SELECT name, COUNT(name) 
  FROM emp
 GROUP BY name 
HAVING COUNT>1;

但是删除相同的所选行并没有帮助我。...

DELETE emp 
 WHERE name IN ( SELECT name, COUNT(name) 
                   FROM emp 
                  GROUP BY name 
                 HAVING COUNT >1);

Answer 1

从内部SELECT删除第二列，如下所示：

DELETE
  FROM emp
  WHERE name IN( SELECT name FROM emp GROPU BY name HAVING COUNT(name) > 1)