Identifying Duplicates In A List Using Conditional Formatting

Nov 30, 2009

I would like to identify duplicates in a list using conditional formatting in Excel 2007.

I have tried choosing to identify duplicates using the formula that I have found on many threads throughout the message board:

=COUNTIF($A$1:$A1,$A1)>1.

This function works up to 15 characters in a cell, but Excel seems to be treating all digits after the first 15 as the same, resulting in a "fuzzy match" where I want an exact match. Many of the values in my list are 18 characters long, in text format to prevent rounding.

I've noticed that Excel treats the 18-characters values the same way when sorting; for example, it treats these two values as the same:

'234567891011121314
'234567891011122413

Is there a way to force Excel to examine those last four digits for the purpose of sorting & identifying duplicates?

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Identifying Duplicates In List

Aug 6, 2009

Here is the deal I have 4 columns. Each line gives you the following information:
The Id is the record number, Code_Name is a code for each Fox in the study, date and area is a sub area in a bigger grid. Basically I have an area divided by squares and every time a marked fox enters in one of my squares a new line in the data is created. What I wonít to know is if a fox when in my area of study will return to the same squares or not.

ID

CODE_NAME

Date

Area

Logical
116

SSS1
02-Jan-09
1A1

273

RRR1
02-Jan-09
2A2

2959

BBB1
02-Jan-09
1B1

2959

What Iím trying to achieve is a 5th column were ill get a logical value of TRUE or FALSE if, for each fox in the next available record a fox went back to the same square or not.
So if you check for the fox RRR1 I have 2 records one in 2 of January in area 1A1 and a second in 7 of January in the same area. For the Fox BBB1 you will see that she was always in different areas and for CCC1 she only came back to one square.

The problem is I have over 400 foxís and 12000 records and Iím trying to get a way of doing it automatically.

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Jul 10, 2009

I need to create a formula that will look at a p/n find its match and add the value from all matching p/n together. After this is done, all of the line items that matched I need them to turn red. But I do not want the first p/n to turn red. It is better explained in my example.

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Mar 19, 2009

My background is many years of Access VBA. From time to time, I'm called upon to work in Excel. I am not that familiar with the library.

I'd like to know if it is possible to do the following:

Examine Column 1 and, for each like value, examine Columns 2 and 3 for duplicate values. Highlight or conditionally format the duplicates in Columns 2 and 3 (again, for each like value in Column 1).

Being that I've coded Access applications for quite some time, I am sure it can be done...I just don't yet know exactly how. I've searched the archive for and found some examples which deal with duplicate data, but have found none yet which quite fit my scenario.

I've found sample code which enforces rules and conditionally formats cells when new data is added. It works fine and I understand it. I'm hoping the kind soul who might help me with the above can explain how I might do both things on the code page.

I assume the Worksheet_Change Event would contain the "enforcement" code.

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Aug 4, 2009

Below is some sample data

Column A is the START date/time

Column B is the END date/time

What I'm looking at doing is high lighting any cell where the START and END dates clash.

Is this possible via CF?

If possible highlight the START cells where a clash occurs.

AB1STARTEND2Fri 03/07/2009 11:30 AMFri 03/07/2009 4:30 PM3Wed 08/07/2009 9:30 AMWed 08/07/2009 10:30 AM4Fri 10/07/2009 1:30 PMFri 10/07/2009 1:00 PM5Wed 08/07/2009 9:00 AMWed 08/07/2009 11:30 AM6Tue 07/07/2009 11:30 AMTue 07/07/2009 1:00 PM7Thu 09/07/2009 11:30 AMThu 09/07/2009 1:30 PM8Tue 07/07/2009 1:30 PMTue 07/07/2009 4:30 PM

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Jul 29, 2006

I can't follow the directions on http://www.ozgrid.com/Excel/highlight-duplicates.htm to make the conditional formatting work. The formula they say to use is = COUNTIF($A$1:$A$100,A1)>1. I've changed the range to read=COUNTIF ($F$10:$G$999,F10)>1 and have applied a format change of the text color. It is obvious I have duplicates but they are not changing color. I have the range highlighted before I go to conditional formatting.

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Oct 4, 2008

I have a worksheet that has times based on 7 minute intervals. If I post 10:37 AM in cell b5 then again in cell b6 I would like b6 to highlight.

I'm trying to use countif($b$3:$b$15,b2)>1 to highlight duplicate times in column B. For some reason it will not work for me. Should I use something different?

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May 26, 2007

I know it can be done cause I've used it before but I can't seem to make it work this time. I want to use the conditional formatting to compare two ranges of cells within one worksheet I know it's something like =match(A2:C12) the two ranges are sitting one on top of the other. . .

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Feb 25, 2014

I use the conditional formatting of duplicates within a column quite often. Now I am trying to highlight duplicates based on multiple cells in the same row. I can't seem to get a formula to make that work. I have four cells in separate columns but the same row, for example H2:K2, H3:K3, H4:K4, etc. I would like to highlight the four cells in that row if there is a duplicate of all four cells in another row. So if one, two or three cells are duplicates in the same column I do not want to highlight any of the cells, it should only highlight the group of four cells if all four cells are identical in another row. Pretty much the same way the default highlight duplicates works, just the value is spread across four cells.

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Aug 13, 2009

Conditional formatting duplicates across multiple sheets. I have been using the formula

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Feb 20, 2012

Using Excel 2007 and conditional formatting, how would I find duplicates across all fields in the table, similar to the "remove duplicates" tool that in default mode selects all the fields or offers the option to select fields of choice. I need to look at all the fields.

I've tried concatenation, but only with a limited number of fields; larger amounts slow the process to a crawl. If my table is 10,000 records with 15 fields, what process would I use to highlight the duplicates. How about something in VBA?

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Feb 9, 2010

I have attached a sample sheet which deals with property sales data, in reference to a two-part question.

1. If the row has two, or more, rows share the same value in column 'E', it needs to be identified with a 'Y' in Column G. In looking through old threads, this seems possible, though I could not find and answer I could 'bend' to work. If this is possible, can the following be included?

2. If two or more rows share the same value in column 'E', list the identifiers (value in Column A) for the others in Column H, separated by commas "," or slashes (preferred) "/".
ie.
"00370600000700 'NICHOLLS JOHN W & CARLA R 11/27/2000 85000 '260647 W Y '00370600000800" and
"00370600000800 'NICHOLLS JOHN W & CARLA R 11/27/2000 85000 '260647 W Y '00370600000700" or
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The sample sheet attached includes 26 rows of data with several 'doubles' and one 'triple' 'duplicates'.

Please note that in the 'real' file, it has slightly less than 200,000 rows and I have seen 'dupicates' up to 40 with the same value in Column 'E'

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Jul 18, 2012

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System 1
System 2
Non-Duplicates

173
215
173

[Code] .......

What is the best approach to use?

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I am involved in a software conversion that is taking 4 full time folks over 5 weeks to clean up and assign an alpha-numeric sequential number to each vendor, client. Each scrubber is reviewing an excel spreadsheet containing the names, addresses, FID, telephone, etc. of our vendors and customers. This information is being pulled from 2 separate sources. We are assigning a BP # to the main office location and not retiring that one. then we go on to identifying the dups. All dups get a Y to be retired, but if they have a different address then the main one, we place a Y to bring that address over under that BP#.

Ultimately, we end up with 2 systems combined into one dumping all old numbers assigned and giving each vendors, customers, etc. a new BP# that may have muliptple addresses.

How can we assign a alpha numeric number without going through each individual line...over 900,000 of them to do. Key is to identify duplicate addresses and duplicate names. Some names might be RK Electrical or Robert King Electrical but the address will be duplicated usually.

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attach file

formattazione.xlsx

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Oct 15, 2012

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R2: 2101 - 2102 - 2103 - 2104 - etc.
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A little further down I am having a list where the end user will write down the exact same number. Once the same number has been written into the list, I would like the number shown in the top rows (row 1 to 3) to be highlighted in green, basically telling the user that the number has been entered into the list below and is ok now.

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Band2 09:00 15:59
Band3 16:00 17:59
Band4 18:00 22:30
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Seperately I have data from a third party like this:

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