문제Column NameTypeidintemailvarchar[Table : Person]id is the primary key (column with unique values) for this table.Each row of this table contains an email. The emails will not contain uppercase letters. Write a solution to report all the duplicate emails. Note that it's guaranteed that the email field is not NULL.주어진 테이블에서 중복된 이메일을 출력해라. 풀이SELECT DISTINCT(ABC.email)FROM (SELECT email, COUNT..
