Excel：查找列中的重复项，另一列中存在差异

Question

I want to highlight cells in column A, which have duplicates in column A but a difference in column B.

A   B  
1   2   -
2   3   +
3   2   -
2   4   +
1   2   -
3   2   -
4   5   - 

The rows (or a cell within the row) with the - shall not be highlighted, but the rows (or a cell within the row) with the + shall be highlighted.

How can I accomplish this in an Excel formula?

Please pay attention to the fact, that not all unique combinations shall be highlighted (last row!).

In SQL the corresponding query would be something like this:

SELECT *
FROM table
GROUP BY A
HAVING COUNT(B) > 1

Answer 1

A simpler solution might be to use Concatenate to join A and B together and use a conditional formating to highlight the unique values. This would leave your desired list highlighted:

For the Conditional Formatting highlight column C then navigate:

Home-> Conditional Formatting -> New Rule-> Format only unique or duplicate values

Then change selection from "duplicate" to "unique" and select the desired format. Apply the setting and have identified the appropriate rows.

Answer 2

Assuming your data is in A1:B7, (with "A" and "B" as headers on row 1):

I used the following formulas to get the matches .. I just did a simple search after, and before .. if it finds a record above or below, it "flags" it in column F as TRUE. Not sure it works for 3 or more duplicates, though you didn't seem to indicate how you wanted a 3 of a kind to work ;)

D2=MATCH(A2,A3:$A$1000,0)
E2=IF(ISERROR(D2),IF(ISERROR(G2),"",OFFSET($A$1,G2,0,1,1)),OFFSET(B2,D2,0,1,1))
F2=AND(NOT(AND(ISERROR(D2),ISERROR(G2))),B2<>E2)
G2=MATCH(A2,$A$1:A1,0)`

D col locates the first matching A column after the current row.

G col locates the first matching A Column prior to current row.

E col pulls that remote B column value to current row to more easily check.

F col puts the logic together: If we found something, and B cols are not equal.

Answer 3

Here is another way to do it assuming your above data is in cells A2:B7 :

1) Copy and paste your column A values to a blank section of your workbook(Lets say A11 ) and perform the following function Data->Remove Duplicates with the section selected.

2) Highlight cells B10:B13(all cells where a value is in column A) and type in the following formula:

=FREQUENCY(A2:A8,A10:A13)

Hit Ctrl + Shift + Enter to make this an array.

3) Similar to step two highlight all cells in column C where there is data in columns A and B. In this case C2:C7 and use the following formula:

=IF(VLOOKUP(A2,$A$10:$B$13,2,FALSE)>1,IF(FREQUENCY(VALUE(CONCATENATE($A$2:$A$7,$B$2:$B$7)),VALUE(CONCATENATE($A$2:$A$7,$B$2:$B$7)))<>1,"","Highlight"),"")

Hit Ctrl + Shift + Enter to make this an array.

Your cells that need to be highlighted will now say "Highlight"