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| =COUNTIF($A$1:$A1,A1)=1 | =COUNTIF($A$1:A1,A1)=1 |
Excel De-duplication
Contents
COUNTIF
A simple way to identify duplicates is to use the COUNTIF function.
Consider the following spreadsheet:
|
A |
B |
1 |
Alice |
1 |
2 |
Bob |
2 |
3 |
Charlie |
3 |
4 |
Daisy |
4 |
5 |
Edward |
5 |
=COUNTIF($A:$A,A1)=1
Alternatively, to identify the unique cases and the first case of a duplicated set, try:
=COUNTIF($A$1:A1,A1)=1
Alternatively, to mark the duplicate sequence of a case, try:
=IF(COUNTIF($A:$A,A1)>0,COUNTIF($A$1:A1,A1),"")