如何在Access查询的字段中计算唯一项? [英] How do I count unique items in field in Access query?

问题描述

我的桌子:table1

My Table: table1

ID  Name  Family
1   A     AA
2   B     BB
3   A     AB
4   D     DD
5   E     EE
6   A     AC

Access上的SQL命令:

SQL command on Access:

select count(*) from table1

输出: ------------> True
6行

Output: ------------> True
6 row(s)

我试图计算唯一名称:

预期输出: 4行

select count(distinct Name) from table1

访问时输出: ------------>错误

Output on Access: ------------> Error

我需要对查询进行哪些更改?

What changes do I need to make to my query?

推荐答案

尝试一下

SELECT Count(*) AS N
FROM
(SELECT DISTINCT Name FROM table1) AS T;

阅读 查看全文