Write a SQL query to find all duplicate emails in a table named Person.
+----+---------+
| Id | Email |
+----+---------+
| 1 | a@b.com |
| 2 | c@d.com |
| 3 | a@b.com |
+----+---------+
For example, your query should return the following for the above table:
+---------+
| Email |
+---------+
| a@b.com |
+---------+
SELECT Email
FROM Person
GROUP BY Email
Having count(Email)>1
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题目链接： 182. Duplicate Emails 解析： 这道题可以直接应用GROUP BY ... HAV...
Write a SQL query to find all duplicate emails in a table...
找到重复的email链接 Table： Person +-------------+---------+| Col...
分析：1.用count函数结合group by可以统计指定字段的数量。假如重复的话，count函数肯定大于1.2....
SQL：
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ProblemWrite a SQL query to find all duplicate emails in ...
本文标题：182. Duplicate Emails
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