Don't Allow Duplicate Entries Across Multiple Columns

Jan 14, 2010

how i can set 'Data Validation' to stop me from entering duplicate values across multiple columns, i can set it for a single column i.e. A1 to A100 but i am after this but for something like A1 to H100.....?

I am currently using this formula in Data Validation:
=COUNTIF($A$1:$A$100,A1)=1

I need something to do this but for multiple columns.

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Duplicate Entries Validation With 3 Columns

Feb 15, 2014

I am looking for either vba or excel method to prevent duplicate entries across multiple columns. The data validation only works when it is input manually by the user and not when it is generated by the formula

What i am trying to do ( assuming " | " are column dividers and each new line is a row)

abc | 2 | bac | 3 | cab | 4

bac | 3 | abc | 2 | cab | 4

abc | 2 | bac | 3 | cab | 4

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Apr 23, 2014

I have a userform that I use for data entry with lots of combo boxes, list boxes and text boxes

One thing i haven't cracked yet is to check for duplicates against two matching fields

If a user (for example) enters 'SAB' (which will be stored in column A) and then 'UK' (which will be stored in column B) and there is already an exact match for both, then I need to inform the user that a matching record already exists

The following is OK: (the dots below are meant to illustrate spaces between the columns!!)
Col(A).....Col(B)
SAB........UK
SAB........USA
SAB........Italy

BUT, if a user then tries to enter:

Col(A).....Col(B)
SAB........UK

I need my userform to register a duplicate entry.

My sub routine is detailed below : .....

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Apr 27, 2014

I have data (e.g. PPL0106AU) in columns A (Rows 2 to 104) & C (Rows 2 to 303) and need to identify which entries are in BOTH columns.

I've entered in column B: =IF(MATCH(A2,C$2:C$303),A2,"No")

This formula is resulting in a duplicate of column A in column B.

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Duplicate Entries In Rows - Add Accompanying Data To New Columns?

Jun 4, 2013

I have attached a before and after image of what I am looking to accomplish.

In the before image, you can see that there are 3 rows of data

- a header

- a repeating model number (in column F) with accompanying data (values in columns G - J are the items of interest)

In the after image, you can see that I took the 3 rows of data and turned it into simply two rows of data

- a header

- the repeating model number

What I did however in the after image, as can be seen, is I took the data that appeared on the repeating row (Row 3 from the Before image), and included the PRICE, COST, BEGIN, and END values in new columns on row 2.

The model number is the same of course, which is why I did it that way.

If the model numbers were different, I would have simply left it alone, as-is.

Is there a way to accomplish this via some functions or maybe even a VBA script?

By the way, if we have to dump all of this onto a new sheet, then so be it.

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Jun 4, 2014

My data set has a number of duplicate entries. But I would like to sort them out based on some conditions. Say for example my C2 code appears three time in the dataset. I would like to sort this multiple code using the time and i column.

Say for example, 871514 code appears three times in this dataset, and if this code appear within three years - time with a different (i column text e.g. public and private), I would like to exclude these three duplicate entries from my dataset. If this code appears within next three years from the date, but have same I column text (e.g.public versus public), I will keep them.

So each code will be considered based on three years of time and type of text in I column. If the code appears again later after three years, I will keep them.

So the codes need to be checked within three years time with i column text.

My dataset identifies the difference of dates between last entry and next entry.

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Nov 28, 2013

I need a Macro to do the following:

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In column B I have the corresponding acronyms spelt out from B2:B90000 and more

When I run the macro, it shoud detect the multiple/duplicate Acronyms and it's corresponding descriptions, DELETE the multiples/duplicates and move the cells up.

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Jan 15, 2013

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Example (I have the below in a single Cell as column headers)
NCM Server Mgmt VLAN Site ID

Next Line down is the data (Each row in a single cell)
Enabled 10.10.10.0 50 TEST SITE 1
Enabled 10.10.20.0 50 TEST SITE 2
Disabled 10.10.30.0 50 TEST SITE 3

How I could achieve this as I have a number of projects where this would become useful

I know you can use delimiters but with spaces between the values I just can't fathom a way forward.

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May 4, 2014

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Jun 9, 2014

I have unit measures that are converted across four columns (FT, SQFT, SQM and SQY).

THere are three units in rows (BOX, Skid and Roll). I am trying to identify in a column labeled "Duplicate Volume" with a formula stating "YES" if there are duplicate numbers (volumes) in any of the four conversion columns listed above. I tried to attach an excel file here but the system will not accept it. Hopefully the diagram i make below will be enough to understand the concept:

Unit Name FT SQFT SQM SQY Duplicate?

BOX 0 0 15 0
BOX 0 0 20 20 YES
Skid 0 10 10 10 YES
Skid 0 0 0 15
Roll 100 10 2 1.5
Roll 0 0 40 40 YES

I have over 50 thousand rows of this stuff...so looking at the data to decide if there are duplicates will not happen.

Any formula that i can put in the column titled "Duplicate" that can identify the duplicates with a "YES" in the cell where duplicates are found?

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Mar 10, 2009

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Jan 4, 2013

I am not sure if Excel is able to do this but basically I am looking to find out which rows have some duplicate values. I have just read this back and it doesn't make a great deal of sense so I have attached an example spreadsheet.

Basically I am looking to find if E1:G1 duplicates further on down the list, hope this makes a bit more sense with the example attached.

Trial Upload.xlsx‎

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May 21, 2014

I'm using the code below to remove duplicate values from a column of cells, in this case column B.

[Code] ..........

The code works fine, but I'd now like to adapt this so I can remove the duplicates from columns B, C, D and F.

I've tried over the last few days different methods but recieve 'Debug' errors.

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Jul 13, 2009

i would like to paste multiple duplicate values from unique values. Is there any way to do it in excel??

Ex:

Table 1:

3MG_HUMAN453
3MG_HUMAN44
3MG_HUMAN953
A1AT_HUMAN285
A1AT_HUMAN76
A1AT_HUMAN234
A1AT_HUMAN653
A1CF_HUMAN96
A1CF_HUMAN23
A1CF_HUMAN765
A4_HUMAN 944
A4_HUMAN 23
A4_HUMAN 755

Unique table

3MG_HUMAN100
A1AT_HUMAN78.89
A1CF_HUMAN90
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I wanted to add new column with these values for table 1 including duplicates. this is sample data and i wanted to replace thousands of this type.

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Apr 8, 2014

I'm looking for a Conditional Formatting formula that will check two columns before highlighting the duplicate rows. I need it to be conditional formatting because I know nothing about writing macros or vba (what-ever that is?). Data is entered into Columns A, B, and C. I need to check both column A and C before it highlights the duplicates, based on those two columns. (The format only unique or duplicate values checks only one column.) I have attached an example, but this is just an example, as I have hundreds of lines to go through on the original. (For this example, Row 2 and Row 7 are the duplicates I need highlighted.)

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My Excel program (Excel 2010) currently has several columns and each column looks for and pulls data from a specific file on my computer. Then I need to delete any duplicate data entries, count the number of unique entries and track the changes through a chart. I have everything done except I cannot figure out (or find on the internet) a way to search in multiple columns (more than 2) and delete just the duplicate cells. I want to delete the cells in a way where there is one left. For example if the code 12gf is duplicated three time, I want to be left with one 12gf (it doesnt matter what column the original one is left in). Additionally, column length changes and they are not sorted. I have attempted to attach an image of an example file below.

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Sep 24, 2009

I have been trying a number of different functions!

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Is there anyway to have the following function exclude duplicates records in Column C? Just count unique records in Column C?

=(COUNTIF('Cases Closed'!O:O,"John"))-(COUNTIFS('Cases Closed'!O:O, "John", 'Cases Closed'!X:X, "*Solution*"))

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Apr 23, 2013

excel.jpg

Basically I've made this up myself because what ill be working with has 100s if not 1000s of rows with many different product numbers that's quantities are different. What I've been able to do up to now is sort the spreadsheet by the product number so all the same rows are next to each other. My problem is however I need a speedy way of making these duplicate rows become one but add the total quantity basically everything in the left screenshot into the one on the right. What I've tried up to now is sorting them so there together and manually adding them up and putting them into one of the rows quantity, then delete the rest. takes to long. Another was to make a row underneath the rows I need into one but that takes more time than manually adding and deleting the rest.

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Jun 13, 2008

I'm working on a employee evaluation form. I'm using a Pass/Fail system.
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Jul 14, 2008

I am trying to find a macro that will clear duplicate entries in a column of data, and then move to the next column and repeat the process until it gets to a blank column.

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Nov 24, 2009

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Feb 8, 2010

I have a table of data like this:

A , 1 , 1
B , 2 , 1
C , 3 , 4
D , 1 , 3
E , 3 , 3

I need to eliminate duplicate entries WITHIN a row. So, I need the table to become:

A , 1
B , 2 , 1
C , 3 , 4
D , 1 , 3
E , 3

Is there an easy way to do this for a large sample? Also, there are actually more like 8 columns of this data, if thats important.

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Dec 11, 2012

I've generated a sheet where, based on the total run hours of a generator set using a given fuel type, we can determine which engine to run on what fuel when. The problem I've run into is that if more than one engine has the same runtime, the chart returns just the lowest numbered engine and eliminates the remaining engine(s). What I'm trying to do is make it so that when this occurs, the suggested engines show up in numerical order. For example instead of 1, 1, and 1 showing up on the chart, something like 1, 2, and 5 will show when they all have 0 run hours. I've attached my chart below with some engines having the same runtimes. RunOrder.xlsx

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May 8, 2009

New here, I wanna do a "Prevent Duplicate Entries" into my column i try the following: http://www.mrexcel.com/articles/prev...duplicates.php
http://www.theexceladdict.com/_t/t040818.htm

They all work well but if I'm using copy and paste It doesn't work! why is tat so?
Second issue will be i'm wanna do prevent duplication for the whole column not just one cell.

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Feb 5, 2009

I have a spreadsheet that has account numbers listed multiple times. I need to eliminate all of the duplicate entries...Is there a formula for this...?

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May 25, 2009

=COUNTIF($A$1:$D$100,A1)=1
however I don't know how to change that to suit my needs (or even if it is at all possible to change it to suit my needs)

I will try my best to explain how my spreadsheet is set up as unfortunately I am at work and I can not use the method to show you the spreadsheet.

My spreadsheet:
I already have Data Validation in use from a list that I created. I use the same validation list in Columns C, E, G, I, K-BA

I also use validation list in other cells, and it is OK if these are duplicated throughout the row.

The only cells that should not contain duplicate information are the ones from C, E, G, I, K-BA

Basically I want to stop someone accidentally chosing the same option from the list within the same ROW.

Just in case it makes any difference I should let you know that I have already had help from the forum regarding macros for this same spreadsheet, here is the macro that is currently running just in case it makes a difference if there is an answer to my current problem.

Option Compare Text 'A=a, B=b, ... Z=z
Option Explicit

Private Sub Worksheet_Change(ByVal Target As Range)

Dim Cell As Range
Dim Rng1 As Range

On Error Resume Next
Set Rng1 = ActiveSheet.Cells.SpecialCells(xlCellTypeFormulas, 1)
On Error GoTo 0
If Rng1 Is Nothing Then
Set Rng1 = Range(Target.Address).........................

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Aug 24, 2006

I want to use (VBA) data vaildation to restrict duplicate entries.

Worksheet Name = "Metal Type"

NoDupe Cell = B15 (allowing text and numbers)

Range to check = (Sheet)="Metal Type" (Range)=A21:A100

Error = Message box "Enter Unique Name in Cell B15"

Then Exit Sub

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