I have a table of dates with names that I would like to aggregate. As time passes, more dates and more names can be added, so I'd like this solution to auto-populate itself.Basically,
| Abe | Bob | Charlie | |
|---|---|---|---|
| 5/12 | 2 | 1 | x |
| 5/12 | x | ||
| 5/13 | 1 | 1 | 1 |
| 5/13 | 1 | 1 |
should become
| A | B | C | |
|---|---|---|---|
| 5/12 | 1 | 2 | 1 |
| 5/13 | 1 | 2 | 2 |
I tried COUNTA(QUERY({Input!$A$1:$H$10}, "SELECT Col"&Column(B$1) - Column($A$1) + 1&" WHERE Col1 = '"&$A2&"'")) - This works, but it doesn't allow me to autopopulate the rest of the table.
I think I need to use ArrayFormula somehow, but from what I've read, it's only able to iterate over the input to the query and not the values in the various columns. I tried ARRAYFORMULA(COUNTA(QUERY({A1:H1; ARRAYFORMULA(VLOOKUP($A$2, Input!$A$1:$H$10, COLUMN(Input!$A$1:$H$1), 0))}, "SELECT Col2 WHERE Col1 = '"&$A$2:$A$4&"'"))), but it doesn't iterate as desired (over $A$2:$A$4).
I'm stuck on how to achieve this.
I have a sample sheet here