I have 3 fields that are joined from 3 different data sets that contain the same type of data. I need to identify any rows that don't match. Also, there are some rows that have blanks/nulls so these would automatically give a false flag, and I would need to determine if the other two populated fields don't match. See an example below where the bold rows are the ones I need to flag:
| Field 1 | Field 2 | Field 3 |
| ABC | ABC | ABC |
| | ABC | ABC |
| ABC | DEF | ABC |
| DEF | DEF | DEF |
| | ABC | DEF |