标签:pre you person query bsp sel 重复 .com state
编写一个 SQL 查询,查找 Person
表中所有重复的电子邮箱。
示例:
+----+---------+ | Id | Email | +----+---------+ | 1 | a@b.com | | 2 | c@d.com | | 3 | a@b.com | +----+---------+
根据以上输入,你的查询应返回以下结果:
+---------+ | Email | +---------+ | a@b.com | +---------+
# Write your MySQL query statement below select Email from person group by email having count(email)>1;
标签:pre you person query bsp sel 重复 .com state
原文地址:https://www.cnblogs.com/JAYPARK/p/10289184.html