為什么會出現“輸入參數值”？

Question

我正在嘗試列出所有出版商，並且在數據庫中有一本書。

查詢：

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

Answer 1

我的猜測是問題在這里...

HAVING COUNT(book) = 1

桌子叫book 。 除非該表還包含一個名為book的字段，否則Access將被混淆。

如果要查看只有一行的Publisher ，請使用此...

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