We all know that VLOOKUP (and its cousins MATCH, HLOOKUP and LOOKUP) are great for finding information you want. But they are helpless when you want to do a case-sensitive lookup.
So how do we write case sensitive VLOOKUP formulas?
Simple. We can use EXACT formula.
What exactly is the EXACT formula?
EXACT formula checks if 2 cells have exactly the same value. And it is very SenSITive.
For example, =EXACT("this","THIS") will be false , where as =”this”=”THIS” will be true.
Using EXACT formula to do case sensitive lookups
Let’s say the value you are looking up is in cell F4, the lookup range is B5:C11 (column B has lookup value and column C has value you want).
You can use EXACT formula along with INDEX + MATCH or SUMPRODUCT to do case sensitive lookup. Let’s look at each of these variations:
Using EXACT & INDEX + MATCH formulas to do case sensitive lookups:
Formula: {=INDEX($C$5:$C$11,MATCH(TRUE,EXACT($F$4,$B$5:$B$11),0))}
How it works?
Let’s go from inside out.
EXACT(F4, B5:B11) portion: This will return an array of TRUE & FALSE values. Something like this:
{FALSE;FALSE;TRUE;FALSE;FALSE;FALSE;FALSE}
MATCH(TRUE, EXACT(...), 0) portion: Now we look for TRUE in all the values EXACT has returned. This will be 3 (since 3rd value in the array is true).
INDEX(C5:C11, MATCH(...)) portion: This will simply return the 3rd value in the column C, ie an exact match.
{INDEX(...)}: Because this is an array formula, you must press CTRL+Shift+Enter after typing it. The {} indicates this.
Related: Learn about INDEX+MATCH combination.
Using EXACT + SUMPRODUCT formula:
If the lookup result is a number (or date) and there is only matching value, you can use SUMPRODUCT to do case sensitive lookups.
Related: Introduction Excel SUMPRODUCT formula.
Formula:=SUMPRODUCT(EXACT($F$4,$B$5:$B$11) * ($C$5:$C$11))
How it works?
The EXACT(F4, B5:B11) portion returns a bunch of TRUE & FALSE values.
When you multiply these TRUE & FALSE values with column C (which contains numbers), the end result will be the value you are looking for.
This is possible because in Excel, TRUE is 1 and FALSE is 0. So when you multiply a list of logical values (true / false) with a list of numbers, everything that corresponds to false becomes 0.
So we get,
{0;0;30;0;0;0;0}
SUMPRODUCT simply adds up these numbers and returns 30 as result.
Note: This formula won’t work if you have text values in column C or more than one TRUE in EXACT result (ie multiple values match the lookup criteria).
For advanced users: SUMPRODUCT – Advanced scenarios
Download case sensitive lookup – example workbook
Please click here to download case sensitive lookup example workbook. Examine the formulas to learn more about this technique.
More ways to lookup:
- 2 Way lookups – lookup in top row & left column and find matching value.
- Wild lookups – lookup a value that starts with Som & ends with ne.
- Range lookup – find a value inside the lower & upper boundary
- Last lookup – find the last value in a list of multiple matches.
- Multi-condition lookups – lookup based on multiple conditions
- Take our VLOOKUP Quiz – how well do you know VLOOKUP?
Get The VLOOKUP Book: If you are always looking for help about VLOOKUP, look no further. Get my book, it’s going to make you awesome in VLOOKUP, INDEX+MATCH, multi-condition lookups, 2 way lookups and more. Click here to order your copy.
How do you write case sensitive lookups?
Let me be honest. I haven’t had a single case sensitive lookup scenario in last year. But email from a reader prompted me to research this problem.
What about you? Do you often deal with case-sensitive data? How do you write case sensitive lookups? Please share your tips & formulas in comments section.
12 Responses to “Analyzing Search Keywords using Excel : Array Formulas in Real Life”
Very interesting Chandoo, as always. Personally I find endless uses for formulae such as {=sum(if(B$2:B$5=$A2,$C$2$C$5))}, just the flexibility in absolute and relative relative referencing and multiple conditions gives it the edge over dsum and others methods.
I've added to my blog a piece on SQL in VBA that I think might be of interest to you http://aviatormonkey.wordpress.com/2009/02/10/lesson-one-sql-in-vba/ . It's a bit techie, but I think you might like it.
Keep up the good work, aviatormonkey
Hi Chandoo,
You might find this coded solution I posted on a forum interesting.
http://www.excelforum.com/excel-programming/680810-create-tag-cloud-in-vba-possible.html
[...] under certain circumstances. One of the tips involved arranging search keywords in excel using Array Forumlas. Basically, if you need to know how frequent a word or group of keywords appear, you can use this [...]
@Aviatormonkey: Thanks for sharing the url. I found it a bit technical.. but very interesting.
@Andy: Looks like Jarad, the person who emailed me this problem has posted the same in excelforum too. Very good solution btw...
Realy great article
"You can take this basic model and extend it to include parameters like number of searches each key phrase has, how long the users stay on the site etc. to enhance the way tag cloud is generated and colored."
How would you go about doing this? I think it would need some VB
Hi,
I found the usage very interesting, but is giving me hard time because the LENs formula that use ranges are not considering the full range, in other words, the LEN formula is only bringing results from the respective "line" cell.
Using the example, when I place the formula to calculate the frequency for "windows" brings me only 1 result, not 11 as displayed in the example. It seems that the LEN formula using ranges is considering the respective line within the range, not the full range.
Any hint?
@Thiago
You have to enter the formula as an Array Formula
Enter the Formula and press Ctrl+Shift+Enter
Not just Enter
Thank you, Hui! I couldn't work out how this didn't work
is there a limit to the number of lines it can analyse.
Ie i am trying to get this to work on a list of sentances 1500 long.
@Gary
In Excel 2010/2013 Excel is only limited by available memory,
So just give it a go
As always try on a copy of the file first if you have any doubts
Apologies if I am missing something, but coudn't getting frequency be easier with Countif formula. Something like this - COUNTIF(Range with text,"*"&_cell with keyword_&"*")
Apologies if I missed, but what is the Array Formula to:
1. Analyze a list of URL's or a list of word phrases to understand frequency;
2. List in a nearby column from most used words to least used words;
3. Next to the list of words the count of occurrences.