问题
I have my VLOOKUP with ArrayFormula working thanks to Adam's (AD:AM) brilliantly spelled-out solution (https://productforums.google.com/forum/#!searchin/docs/parallel$20lookup$20solution/docs/36A0epDlIdE/qnywZst0DioJ)
So in col J this is what I have:
=ArrayFormula(VLOOKUP(H2:H;ProductTable!A2:C;3*SIGN(ROW(H2:H));FALSE))
Works great. However, I would like to then take the returned value(s) from that formula in col J and multiply it against the Qty value(s) that are in row I.
Obviously I could add an extra helper column in col K...
=ARRAYFORMULA(I2:I*J2:J)
...but I was hoping to avoid adding yet another column to my Query results, especially since the returned results in col J have no visible purpose on the worksheet - they are meant to be used strictly for mathematical purposes only.
I've attempted multiple ways of slipping that formula into the ArrayFormula / VLOOKUP function in col J, but I've had no luck thus far.
Maybe it can't be done(?), or maybe I could just benefit from a fresh set of eyes looking at this issue.
回答1:
Never mind. I'm not sure why this didn't appear to work when I had tried it before, but out of desperation I just walked away for a while, and then just re-tried everything again. And this time I get the results that I was looking for:
=ArrayFormula(VLOOKUP(H2:H;Backend_Product!A2:C;3*SIGN( ROW(G2:G));FALSE )*I2:I)
(a bit of a DUH, so maybe I had originally referenced the wrong column or something)
回答2:
The post you referenced is from 2011. I think that use case has been resolved since then.
I have a column using the formula =ArrayFormula(VLOOKUP(J$2:J,$C$2:$D,2,FALSE)). I created a check column with =VLOOKUP(J2,$C$2:$D,2,FALSE) which I dragged down a number of rows.
It appears that, in the array formula, J is being iterated just as it is in my dragged formula, while C:D are fixed. Both the original column and check column have the same result data so far as I've dragged the check column down.
Caveat: I did not do an exhaustive search or create a particularly clever test case. I just eyeballed a good heaping of rows of actual data.
来源：https://stackoverflow.com/questions/22260953/google-spreadsheet-vlookup-with-arrayformula-plus-multiplication-of-returned-val