Oracle 查找表中重複信息的語句

查找表中字段重複信息的語句，根據單個字段(peopleID)判斷：

select * from people
where peopleId in (select   peopleId from   people group by   peopleId having count

(peopleId) > 1)

參考：https://www.cnblogs.com/wangzhuxing/p/7727713.html