假如数据在E1:E100,可以用公式:=SUMPRODUCT(--(LEN(E1:E100)-LEN(SUBSTITUTE(E1:E100,"Z",""))=1))
假设数据在A1:A100=sumproduct(--(countif(A1:A100,"Z")=1))
例如:统计第一列的A1至A20里包含Z的个数,=COUNTIF(A1:A20,"Z")