在SQL中列出特定值

Question

我这里有一张名为TEST的表格。我想显示我家的左撇子和惯用右手的人数。

怎么会这样做？这是我做的：

+---------+---------+
|  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      |
+---------+--------------+

我该怎么办？

Answer 1

简单！

{{1}}