I have data in the following format:
Id Value ------------ 1 20 2 40 3 20 3 20 4 50
I want to sum the value column while excluding duplicates from the id column. In this case, I should end up with a total of 130. Can anyone help?
You can create a new column with duplicates removed; SUM() the new column.
Use the COUNTIF() function to reduce values for duplicate ID's to 0 in the new column like this:
(example above assumes ID's are stored in column A, and their values are stored in column B)
From Microsoft: Filter for unique values or remove duplicate values