Access中的MYSQL查询

Question

在Query exp＆＃39;中获取与函数一起使用的错误参数数量错误

SELECT DISTINCT MATERIAL
FROM EORD
GROUP BY Material
HAVING SUM(IIF(CDate(Format([Valid To],"####/##/##")) < now()),0,1) = 0;

Answer 1

你的括号错了。 IIF()需要3个参数，你只给它1个。SUM()需要1个参数，你给它3.它应该是：

HAVING SUM(IIF(CDate(Format([Valid To],"####/##/##")) < now(),0,1)) = 0;