EDATE is used when you want to add some number of months to a single date
instead of a column (for which you would use DATEADD)
syntax: EDATE(startDate, numMonths)
returns startDate + numMonths months
examples:
EDATE(18/07/2022, 1) returns 18/08/2022
EDATE(18/07/2022, -1) returns 18/06/2022
EDATE(30/01/2022, 1) returns 28/02/2022 -- edge case for Jan 29th, 30th and 31st