I have a csv file of orders from a business I run the web shop for, around 30 thousand entries total. I would like to FIND all entries which have a duplicate in the base: same customer, same total due amount and placed on the same day (some customers make repeating orders but over longer timeframe).

I found a help article regarding removing duplicate values, but it doesn’t really apply to my situation, because I want to remove UNIQUE values.

How would I go about that?

  • @erAck@discuss.tchncs.deM
    2•1 year ago

    Add a helper column concatenating cell contents (in the following example of column A and B, multiple cells or ranges are possible, see TEXTJOIN() online help) with a delimiter that does not occur in data, here the | vertical line or pipe symbol:

    C1: =TEXTJOIN("|";0;A1:B1)

    Copy-paste or pull down formula C1 to the desired range of rows.

    For each row count the number of occurrences, assuming data in rows 1:99 here:

    D1: =COUNTIF(C$1:C$99;C1)

    Copy-paste or pull down formula D1 to the desired range of rows.

    Filter on column D >1, or sort data in columns A:D on column D descending and at the bottom delete rows with value 1 in column D.