您的购物车目前是空的！
Mysql查询某字段值重复的数据
查询user表中，user_name字段值重复的数据及重复次数
select user_name,count(*) as count from user group by user_name having count>1;查询user表中，user_name字段值重复的数据及重复次数
select user_name,count(*) as count from user group by user_name having count>1;