MySQL 查询表中重复数据

查询重复手机号

SELECT
	user_mobile 
FROM
	`t_user` 
GROUP BY
	user_mobile 
HAVING
	COUNT( user_mobile ) > 1;

 

查询重复的手机号及数量

SELECT
	user_mobile,
	COUNT(*) AS count 
FROM
	`t_user` 
GROUP BY
	user_mobile
HAVING
	count > 1;

查询所有重复的手机号的详细信息

SELECT
	* 
FROM
	t_user 
WHERE
	user_mobile IN ( 
		SELECT 
			user_mobile 
		FROM 
			`t_user` 
		GROUP BY 
			user_mobile 
		HAVING 
			COUNT( user_mobile ) > 1 
	);