关于mysql错误：Subquery returns more than 1 row

EXPLAIN select * from mytable where shouji = (select shouji from mytable GROUP BY shouji HAVING count(shouji)>2)
> 1242 - Subquery returns more than 1 row
> 时间: 0.002s

这个错误是：子查询返回了多行数据

解决方法：

以 

select * from mytable where shouji = (select shouji from mytable GROUP BY shouji HAVING count(shouji)>2);

为例。

1）在子查询条件语句加limit 1,找到一个符合条件的就可以了
select * from mytable where shouji = (select shouji from mytable GROUP BY shouji HAVING count(shouji)>2 limit 1);
3）在子查询前加any关键字
select * from mytable where shouji = any(select shouji from mytable GROUP BY shouji HAVING count(shouji)>2);