If I were to hire an data analyst, I would simply ask them to write a complex IF formula in Excel. If they can write it, the interview progresses, else, they are out. In other words,
=IF(person_can_write_big_fat_IF_formula=TRUE, proceed_with_interview, say_thanks_and_call_next_person)
If you are able to write IF formulas for any situation, then you are bound to be awesome in Excel.
So, to test how well you know your IFs & Boolean functions, let me give you a small challenge.
Galo, one of our readers emailed this to me.
I would like to ask for your help in creating a tracker sheet for rewards program if they meet the qualifiers in order to avail it.
The conditions will be the following:A.If the attendance is equals to 0% then they will earn Php 1500
If the attendance is less than 3% then they will earn Php 1000 only.B.If the handling time less than 500 seconds reward will be Php 1000 (applicable only phone call request)
If the handling time less than 560 seconds reward will be Php 1000 (applicable only fax request)
Note: They can never have both phone and fax requestC.If there’s a commendation (1 or more) reward will be Php 1000
D.If the quality audit is 98% -100% reward will be Php 1500
If the quality audit is 96% -97.99 % reward will be Php 500Overall if they were able to meet all of the qualifiers they can earn Php 5000.
Download the sample data
Click here to download the sample data. Your objective is to fill column I with appropriate IF formula to calculate the Cash bonus component.
Post your answers
Once you complete the formula, share them with me & others using comments. Go ahead and tell me the answer.
Note: when posting your answers, make sure you add space after any < or > symbols. Or else, they will not show up. So instead of writing A1>10, write A1 > 10 or A1 GT 10. Sorry for the extra hassle.
Learn how to use IF formulas
IF formula is an important for any Excel analyst. Read these articles to learn more about IF formula & related formulas.
- IF formula – what is it and how to use it?
- IF formula – 5 examples
- Introduction to SUMIF & COUNTIF formulas
- Introduction to SUMIFS formula
- Logical & Conditional formulas in Excel
- More IF Formula examples & scenarios
Thanks to Galo for emailing this question.
8 Responses to “Pivot Tables from large data-sets – 5 examples”
Do you have links to any sites that can provide free, large, test data sets. Both large in diversity and large in total number of rows.
Good question Ron. I suggest checking out kaggle.com, data.world or create your own with randbetween(). You can also get a complex business data-set from Microsoft Power BI website. It is contoso retail data.
Hi Chandoo,
I work with large data sets all the time (80-200MB files with 100Ks of rows and 20-40 columns) and I've taken a few steps to reduce the size (20-60MB) so they can better shared and work more quickly. These steps include: creating custom calculations in the pivot instead of having additional data columns, deleting the data tab and saving as an xlsb. I've even tried indexmatch instead of vlookup--although I'm not sure that saved much. Are there any other tricks to further reduce the file size? thanks, Steve
Hi Steve,
Good tips on how to reduce the file size and / or process time. Another thing I would definitely try is to use Data Model to load the data rather than keep it in the file. You would be,
1. connect to source data file thru Power Query
2. filter away any columns / rows that are not needed
3. load the data to model
4. make pivots from it
This would reduce the file size while providing all the answers you need.
Give it a try. See this video for some help - https://www.youtube.com/watch?v=5u7bpysO3FQ
Normally when Excel processes data it utilizes all four cores on a processor. Is it true that Excel reduces to only using two cores When calculating tables? Same issue if there were two cores present, it would reduce to one in a table?
I ask because, I have personally noticed when i use tables the data is much slower than if I would have filtered it. I like tables for obvious reasons when working with datasets. Is this true.
John:
I don't know if it is true that Excel Table processing only uses 2 threads/cores, but it is entirely possible. The program has to be enabled to handle multiple parallel threads. Excel Lists/Tables were added long ago, at a time when 2 processes was a reasonable upper limit. And, it could be that there simply is no way to program table processing to use more than 2 threads at a time...
When I've got a large data set, I will set my Excel priority to High thru Task Manager to allow it to use more available processing. Never use RealTime priority or you're completely locked up until Excel finishes.
That is a good tip Jen...