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I have a large data file. In this table, there are 3 columns with repeating information, but I need to identify the where the data has duplicates (x 3).

I haven't been able to try anything, as I am drawing a blank as to what I could use as a conditional formatting formula.

Column A: has binary data. Example "1 & 0" Column B: has the 11 repeating descriptive data. Example "A to K" Column C: has the date

Each data is repeated multiple times in each column, but I need to identify when it is repeated for the same date (found in column C).

In the example below, I would want to identify the duplicate of
Column A: 1
Column B: C
Column C: 25-04-01

The "1" and "C" show up twice for the date "25-04-01" (YY-MM-DD) which is why I need it formatted and thus standing out of the lot.

Column A Column B Column C
0 A 25-04-01
0 B 25-04-01
0 C 25-04-01
0 D 25-04-01
0 E 25-04-01
0 F 25-04-01
0 G 25-04-01
0 H 25-04-01
0 I 25-04-01
0 J 25-04-01
0 K 25-04-01
1 A 25-04-01
1 B 25-04-01
1 C 25-04-01
1 C 25-04-01
1 D 25-04-01
1 E 25-04-01
1 F 25-04-01
1 G 25-04-01
1 H 25-04-01
1 I 25-04-01
1 J 25-04-01
1 K 25-04-01
0 A 25-04-02
0 B 25-04-02
0 C 25-04-02
0 D 25-04-02
0 E 25-04-02
0 F 25-04-02
0 G 25-04-02
0 H 25-04-02
0 I 25-04-02
0 J 25-04-02
0 K 25-04-02
1 A 25-04-02
1 B 25-04-02
1 C 25-04-02
1 D 25-04-02
1 E 25-04-02
1 F 25-04-02
1 G 25-04-02
1 H 25-04-02
1 I 25-04-02
1 J 25-04-02
1 K 25-04-02

I have yet to find how. I've found ideas using "COUNTIF" but it didn't work. Conditional formatting wan't of any help yet.

1
  • Use COUNTIFS (as in '=COUNTIFS(A:A,A2,B:B,B2,C:C,C2) on row 2 and copy down. Commented Apr 29 at 5:54

1 Answer 1

1

Conditional formatting using COUNTIFS will do this;

Assuming the data is in A1 to C47;
Add new CF as shown
formula is;

=COUNTIFS($A$2:$A$47,$A2,$B$2:$B$47,$B2,$C$2:$C$47,$C2)>1

CF implementation

The two rows as marked are highlighted
I added another row (inserted at row 42) that duplicated row 37 to show two dups;

1   B   25/04/2002

Sheet with CF

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