Mysql 在SQL中列出特定值

我在这里有一个表名为，

TEST

。我想显示我家中左撇子和右撇子的人数

如何做到这一点？以下是我所做的：

+---------+---------+
|  NAME   |  HANDED |
+---------+---------+
| Jeffrey |    R    |
| Ashley  |    L    |
|  Bob    |    R    |
|  Dad    |    R    |
|  Mom    |    R    |
+---------+---------+

SELECT HANDED, COUNT(HANDED) AS COUNT_HANDED
FROM TEST
WHERE HANDED = 'L' OR HANDED = 'R';

我希望输出如下：

+---------+--------------+
|  HANDED | COUNT_HANDED |
+---------+--------------+
|    L    |       1      |
|    R    |       4      |
+---------+--------------+

我怎么能做这样的事？

简单

SELECT HANDED, COUNT(HANDED)
AS COUNT_HANDED
FROM TEST
GROUP BY HANDED;

---

只需将

手动分组

添加到末尾…哦！我太笨了。