sql - 为什么我会收到“输入参数值”？

Question

我正在尝试在数据库中列出所有拥有一本书的出版商。

询问：

SELECT Publisher
FROM book
GROUP BY Publisher
HAVING COUNT(book) = 1;

Answer 1

我的猜测是问题在这里......

HAVING COUNT(book) = 1

该表名为book。除非该表还包含一个名为 的字段book，否则 Access 将被混淆。

如果您想查看Publisher哪些只有一行，请使用此...

SELECT Publisher
FROM book
GROUP BY Publisher
HAVING COUNT(*) = 1;