题目:
题目链接: https://leetcode-cn.com/problems/delete-duplicate-emails/
解题思路:
delete的使用,使用表自己和自己关联
SQL:
DELETE p1 FROM Person p1, Person p2 WHERE p1.Email = p2.Email AND p1.Id > p2.Id;
题目链接: https://leetcode-cn.com/problems/delete-duplicate-emails/
delete的使用,使用表自己和自己关联
DELETE p1 FROM Person p1, Person p2 WHERE p1.Email = p2.Email AND p1.Id > p2.Id;