I have a list that has 2 columns, ID and Days. ID is a foreign key from another list(look up column) and days is a calculated column. I need an effective way to sum the days column for each entry where the ID field is the same. So for example, if there are 3 records for ID 21 each with a day calculation of 20, I would like a record in a 3rd table to read ID 21, Days 40. In excel, you could use SumIf, but sharepoint doesn’t have that ability that I know of.
Has anyone tried anything similar?