📜  在sql代码示例中获取重复记录

📅  最后修改于: 2022-03-11 15:05:25.802000             🧑  作者: Mango

代码示例6
Multiple field=
SELECT username, email, COUNT(*)
FROM users
GROUP BY username, email
HAVING COUNT(*) > 1

Single field=
SELECT _column, COUNT(*) 
FROM _table
GROUP BY _column
HAVING COUNT(*) > 1