I want to return the sum of all cells in ColumnA only if the value of a cell on the same row is equal to a specific value.
For example, sum C4 if D4 = "Bob". Assuming there are six rows whereby "Bob" appears in ColumnD, I would expect that the sum of six values from ColumnC would be added together.
My suspicion is the above requires use of a loop, which Google Spreadsheets does not provide.
Best Answer
=SUMIF(D:D,"bob",C:C)
in C column are numbers, in D column are ("bob" or others)
if you wish do not sum all column you can use for example
Note: Text is case sensitive (Bob is not equal bob)