原题leetcode,数据库常用操作去重，思路就是按照email列相同合并后（其实这时候已经去重了）取出ID，从person中删除不存在ID
# Select 嵌套使用临时表时，需要为临时表指定别名 a。
# group 默认不会选择最大最小ID，只会选择行靠前的ID
delete
from person
where Id not in
(select * from (select min(Id) from person group by Email)as a)
DELETE p from Person p, Person q where p.Id>q.Id AND q.Email=p.Email
Delete Duplicate Emails Rising Temperature
196. Delete Duplicate Emails Description Write a SQL quer...
题目：196. Delete Duplicate Emails Write a SQL query to dele...
[https://leetcode.com/problems/delete-duplicate-emails/]M...
LeetCode196. Delete Duplicate Emails 题目 Write a SQL query...
原题leetcode,数据库常用操作去重，思路就是按照email列相同合并后（其实这时候已经去重了）取出ID，从p...
ProblemWrite a SQL query to delete all duplicate email en...
题目链接： 196. Delete Duplicate Emails 解析： 这道题比较简单，其实是直接考查DEL...
Write a SQL query to delete all duplicate email entries i...
D80 182. Duplicate Emails 题目链接 182. Duplicate Emails 题目分析...
本文标题：Delete Duplicate Emails
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