COUNTIF函数,第一参数必须为单元格引用,不能是公式结果,所以不能用DATEDIF(A1:A26,TODAY()来充当。而SUMPRODUCT函数,是计算乘积之和的函数,即可以对单元格引用,也可以对公式结果进行计算,所以能够使用。如果求大于今天日期的个数,可以用COUNTIF=countif(A1:A26,">"&today())也可以用SUMPRODUCT=SUMPRODUCT(N(A1:A26>TODAY()))[hallo.heeryt.cn/article/136245.html]
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