This is a guest post by Sohail Anwar.
Let’s not bore you with an intro. You are about to learn a VLOOKUP trick that Lucifer himself would not want you to know. It’s so absurdly powerful that it was developed in a lab and had to be tested on Rocky’s arch nemesis Ivan Drago.
Presenting the Multiple criteria VLOOKUP!
…boring…pass, we’ve seen it.
Oh, have you? Not like this you haven’t. This will change the way you work with Excel.
Let me start with an easy example. Here’s some data and we would love to know what Bb and Dd is.
Easy. Let’s put a helper column in that concatenates the two inputs and do a basic VLOOKUP.
Puh-lease. How boring.
Bye Bye Helper Column, it was nice while it lasted.
With a dash of CHOOSE and sprinkling of Array formulas, we’re about to change the game:
=VLOOKUP($E2,CHOOSE({1,2},$A$2:$A$7&$B$2:$B$7,$C$2:$C$7),2,0) and press Ctrl + Shift + Enter
Without getting into too many details, using the Array creates a makeshift virtual helper column. You don’t have to understand Array formulas to make them work for you. I will lay out the simple structure that you can replicate
VLOOKUP(lookup value, CHOOSE({1,2,...N},Column1 & Column 2 &…& Column N, Result Column),2,0)
Where the lookup value is either something pre-concatenated (like Bb or Dd above) or you are using multiple criteria that you concatenate when entering the lookup value. The CHOOSE structure is easy. Always {1,2} then concatenate (with &) as many columns as you want (that the lookup values will need to look in) and the VLOOKUP’s column number is always 2. Let’s explore another example:
Let’s say we want to look up the Savings Produced for a Director of Grade D who started in 2014. That’s 3 lookup criteria. Let’s follow the structure.
=VLOOKUP(A13&A14&A15,CHOOSE({1,2},A2:A10&B2:B10&C2:C10,D2:D10),2,0) and press Ctrl + Shift + Enter
The two key things to note is that our lookup value is a concatenation of the criteria, in this case I have put the criteria in A13, A14 and A15 (hence A13&A14&A15 is our lookup value). Secondly, in the CHOOSE formula, the ranges in the middle part (A2:A10&B2:B10&C2:C10) have to be concatenated in the same order that the lookup value was concatenated. So we concatenated:
Start Year & Grade & Role
In both the lookup value and lookup columns within the CHOOSE.
I stumbled on this many years ago at work and it is the easiest way to do multiple criteria lookups. Play around and add more criteria…but that’s just the beginning!
When I get that feeling, it’s like Textual Healing
So how can we take this concept and make it even more useful?
First, let me share my story of pain and anguish.
Often when dealing with volumes of text data I make numerous helper columns to deal with the multitude of ways I am presented with names. Anyone who’s reconciled HR data to Finance data for example can appreciate that pain. Finance write their names First Name (column 1) Surname (column 2), then HR provide a spread with Last Name, Surname (column 1), then all of a sudden the Project team join in the fun with First Name, Surname (column 1)! Arrghh!
So I am now left to deal with this chaos via numerous text formulas involving SEARCH, LEFT, RIGHT, MID, LEN and MYSANITY (okay perhaps that last one is my own UDF, my volatile UDF). So, maybe it’s not that bad, but when you’ve been doing it for as long as I have, it gets tedious and you begin to search for efficiency. So, one day like the rebellious closing scene from Dead Poet’s society, I stood on my desk and declared ‘Oh Captain, My Captain’ as I refused to create another ‘helper’ column.
After my colleagues talked me down from the table and reassured me (“There there Sohail, I don’t mind inserting new columns for you occasionally”…”Sure you don’t John, sure you don’t”), I went about finding a less ‘helpful’ way. Would you believe, our new friend the multiple criteria lookup was the answer.
You see, not only can our criteria be cell references but also extra characters! Let’s say we have First Name(Column A), Surname (Column B) and Unique Reference (Column C). Someone gives us a spreadsheet with the names in either a First Name + Surname or Surname, First Name format. We can look this up by including the extra characters in our lookup columns within the CHOOSE.
Look closely at the middle of the CHOOSE since that’s where the magic is. Download the workbook to see the example in action.
We have pretty much instructed the two columns we are looking up to join up in a specific way. First we want them to join up with a space in between. Then the second formula has asked them to join up Surname, comma and space in between, then finally the First Name. So as far as Excel is concerned we have created two virtual helper columns that look like this:
This makes it straightforward for us to look up John Johnson or Johnson, John in them.
There are virtually no bounds to how you can use this Multiple Criteria VLOOKUP. It made my life tremendously easy and I’m sure it makes yours easier too. Do me a favor and let me know in the comments some of the crazy ways you are applying it.
And then if you haven’t already grabbed a copy of Chandoo’s VLOOKUP book I cannot recommend it enough as the ultimate resource in VLOOKUP mastery
Download Example Workbook
Click here to download the example workbook prepared by Sohail. Play with it to learn more.
Added by Chandoo
Thank you Sohail
Thank you Sohail for writing this very useful, incredibly fun tutorial. I am sure our readers will enjoy it as much as I do. Thanks.
If you like this, please say thanks to Sohail.
Related discussion on Multi-conditional lookups
As you can guess, this is not the first time we talked about using multiple conditions in VLOOKUP. Check out below articles for more ideas & tips:
- Multi-condition lookup using Excel
- Using CHOOSE formula to make VLOOKUP go left
- Introduction to SUMIFS & CHOOSE formulas
About the author: Sohail Anwar is a Londoner who has spent over 10,000 hours applying Excel in his professional life and earns well over 6 figures as a result. Now he’s on a mission to teach professionals how to massively increase their earnings by learning and applying Excel like never before. Find out more about Sohail on Earn With Excel or LinkedIn
42 Responses to “Prevent Duplicate Data Entry using Cell Validations”
Hi Chandoo, I need you help in the following problem.
I'm trying to get a direccion from a found result. With this dirreccion I will want the before cell value. For example, If result of a find is 38 localized in cell $C$2, I need to get previus value (cell $B$2 ), maybe Andrés.
Do you know some way to do that?
Thank you for you help.
Hi Chandoo
Thanks for this. One thing though: In my pre-2007 version of Excel, the COUNTIF function doesn't recognise a semicolon (;), but requires a comma.
Is the semicolon an Excel 2007 thing?
Jair... I am not sure I understand what you want. what do you mean by Dirreccion?
@Lincoln: I am sorry, often I forget that I am using European version of excel where the delimiter is ; instead of ,. I have corrected the formula now.
Thanks for this nice tip, i used to do a find all after filling every new items which was cumbersome.
Do you know a way to extend this validation search to other tabs/sheets ?
Thanks for you attention. I'm trying to get of value continue from a found value. Let me show a example:
Name Years
John 35
Maria 28
Teresa 32
If I search the max years, the result is 35, but I need that result to be John. Do you know how I can do it?
@Subbu.. you can easily extend the validation to other sheets by pasting the data validations. See the latest article here: http://chandoo.org/wp/2009/10/28/copy-data-validations/
@Jair.. you can use the large() or small() formulas to do this. for eg. =index(A1:A3,large(B1:B3,1)) will get you the name of the person with highest "years". More help here: http://chandoo.org/excel-formulas/large.html
Hi, I don't know if I'm using bad the formula or its performance is diferent for my Office version. Large() formula return the value in the cell, in my example 35. The index() formula use a range, row and column. I'm using the large() as number of row, and it is bad because into the range don't have row 35. This is my perception. What do you think?
Hi, I going to prove, with this solution by JLD http://jldexcelsp.blogspot.com/2008/07/extraer-direccion-de-celda-en-matriz.html
Hello,
I am trying to attempt data validation in Excel Mobile, but the DV tool isnt available. I want to prevent duplicates is all, any advice on acheiving this in Excel Mobile? Thanks..
@Jair... my french aint that good. it starts at "merci" and ends at "beau coup".
Anyhow, you need to merge the large with vlookup to do this. I am not sure if you have solved the problem. Otherwise let me know with details and I can write the formula in comments.
@Chad... I have never used excel mobile, so I have no idea. May be they have not implemented data validations in excel mobile.
Any excel mobile users out there?
Hi Chandoo, the proposed solution by JlD is interesting. He created a macro to get values when the matrix is not one dimensional, how on my problem. This fuction for me.
I would like to share you my work, how can I upload?
@Jair.. sorry for such a delayed reply.. you can upload the files to skydrive and link them here. Or you can email them to me at chandoo.d @ gmail.com and I will upload them somewhere. But it could take forever if you email files to me as I am a bit lazy.
[...] Day 31: Advanced Data Validation Tricks in Excel – Part 2 [...]
Hi,
Can you help me in Microstrategy?
Br,
Moin
really wonderful article. I feel it is implementing Primary Key concept into spreadsheets.
Hi article on data validation. Excel is a very versatile platform to work with and we use it for all kinds of data tabulation. In fact this must have been the most rudimentary data management tools I must have worked with and knowing such tips only adds functuionality to our user experience. Great article. looking forawrd to read more.
Hi Chandoo,
Thanks for such a nice idea.
I tried copy paste the data into the validated area, but the pop-up msg (warning msg) doesn't came. Is it something that we need to update the data manually each time,.
Do we have any option where we can bulk upload the number and it throws a warning message that the data already exits and do we want to continue with this ?
Please do reply me.
Thank you.
Regards,
Vasanth.
It was really useful chandoo...thanks a lot...
Tried this in excel 2010 and it did not work?
Could the newer excel have changed that much?
@Leo
It works fine in Excel 2010
The formula used above =COUNTIF($B$4:$B$11,B4)<=1
only applies to the range B4:B11
Did you adjust the range to your data?
This page helped me accurately to find solution of my question. thanx
we want to prevent duplicate entries in three columns combined, using data validation, i.e. say, column A has first name and Column B has middle name, Column C has last name. the first name can be duplicate, middle name can be duplicate, last name can be duplicate, but not all three at the same time.
I want to prevent duplicate entries in three columns combine, using data validation, i.e. say, column A has first name and Column B has middle name, Column C has last name. the first name can be duplicate, middle name can be duplicate, last name can be duplicate, but not all three at the same time.
Hi, I've tried above validation method to prevent duplicate value from entering into the cells. It's work, when user key in the data into the selected range. However, it's not working when user copy-&-paste the info into the same range.
Please advice. Thanks.
Hi Chandoo,
Does it work in Excel 2007?
Please Reply
thanks chandoo........
it does not work when data is copy pasted...any solution for this??
hi i m shaloo and i want to know in excel if i write duplicate no.then it says or show about we are write duplicate no.
Hi Chandoo
I've tried using this with a Named Range, which is actually a column in a Table as DV wont accept a table reference, and it wont work.
Also tried using Offset to specify the Named Range, but that wont work either.
Is it possible to use Named Ranges with DV?
Thanks
Kris
I have tried the above formula on a table column. The Error box does not pop up, there is only the small ! next to the cell with the duplicate. The column I am working with is formulas that produce a date. Is the reason it doesn't work that the cells contain formulas rather than data?
The formula works but only if I enter data in cell above it. So for example, if I have "123" in B11 it does not allow me to enter "123" in B10, B9, B8, etc. But I can still enter "123" in B12. Please help! 🙂
Great tip.. thanks a lot
I have 21 years of experience working as data entry assistant. I constantly read several blogs to keep myself up-to-date with the advances in data entry profession. I really enjoyed this blog post. From my several years of experience, I agree with you 100% when you say, “ We all know that data validation is a very useful feature in Excel. You can use data validation to create a drop-down list in a cell and limit the values user can enter. ”
Keep blogging. I will come here again.
--data entry assistant
Hi,
This is really very helpful.
Thank you
how can i assign two validation on a single cell
one is for list validation (means the data should be from that range)
second i want to prevent them from repetition
how can i do this ?
P7 to P506 have GR# which are for list
i want to prevent C column to not to repeat and should be from the P column
@Junaid
Can you please post the question in the Chandoo.org Forums
http://forum.chandoo.org/
You have to register to be able to post questions
Please attach a file so that a specific answer can be delivered.
i made an account but there is no option available to post questions ??
where can i ??
@Jubaid
Goto http://forum.chandoo.org/
Goto Ask an Excel Question
Post New thread
Type your question
Attach a file
Please attach a file so that a specific answer can be delivered.
friend can any one tell me the formula
exname location qty
gaurav 1 1
rofan 2 5
sandeep 3 6
gaurav 4 3
rofan 5 4
sandeep 6 8
gaurav 7 9
If this is a data.
if i want a formula by which if i type gaurav then all the location and qty should be shown in a new page.
i had 5,00,000 sku so if i punch one name i can get the entire details
@Gaurav
Can you please post the question at the Chandoo.org Forums
http://forum.chandoo.org/
Please attach a sample file for a quicker more targeted response
IF(ISERROR(INDEX($B$3:$C$9,SMALL(IF($B$3:$B$9=$B$12,ROW($B$3:$B$9)-ROW($C$2)),ROW(A1:C1)),2)),"",INDEX($B$3:$C$9,SMALL(IF($B$3:$B$9=$B$12,ROW($B$3:$B$9)-ROW($C$2)),ROW(A1:C1)),2))
please explain
YOUR COUNTIF FORMULA IS REALLY HELPFUL AND WORKS. I TRIED SEVERAL SITES BUT THEIR FORMULA DOES NOT WORK. ONLY YOU HAVE GIVEN A RIGHT FORMULA!
THANK YOU!!!!!