Excel Sum if not Null String
问题 I would like to sum all cells in column B that corresponds to cells in column A which are not empty. However, in Excel, the term "not empty" is a bit ambigious: if a cell contains a formula, but the result is a null string, i.e. =IF(1=0,1,"") , it is considered not empty, even though the result is essentially nothing. However, I want to exclude such cells. The obvious thing to try first is =SUMIF(A:A,"<>",B:B) But this does not work, because the operator <> only says a cell is empty if it is