List.Accumulate in Power Query with Practical Examples

[@GoodlyChandeep]

Check out our newly launched M Language course ↗ - goodly.co.in/learn-m-powerquery/

[@BrainyBrunetteBarbie]

As an accountant I love that you used “closing balance” in your example. ALSO, it would not be a Goodly video without “Please take a look”! That phrase always makes me smile.

[@GoodlyChandeep]

*I am pleased that you took a look* 😉

[@karimallahwala7022]

The Example „closing Balance“ was fantastic. It gave me so much opportunities for use this „List.accumulate“ Thank you so much. You lift my Powerquery-using-possibilties to another Dimension. Thank you so much. Really excellent and out-Standings Content you offer

[@GoodlyChandeep]

Wonderful!

[@hubersoncunha]

Que aula top, muita coisa que eu não sabia que dava pra fazer utilizando o List.Accumulate! Parabéns.

[@3Starsgamer34]

Wonderful. You opened the way of looping in PQ. I think the list need to be wrapped in List. Distinct to get unique values for trainings

[@GoodlyChandeep]

Yes correct I missed that in the video😬

[@iancoify]

holy moly, I am blessed to have found you. Severely underrated channel.

[@GoodlyChandeep]

Thanks man! Glad to find you also 💚

[@zahoorsarbandi2982]

Absolutely amazing! Believe me this is the single video available on internet which has explained the List.Accumulate so easily and perfectly that only this lecture is sufficient to watch for complete understanding for this difficult function. Well Done!

[@GoodlyChandeep]

Wow, thank you!

[@stevegarside5026]

Genesis! The method used to create multiple columns within a table is brilliant! Thanks for taking the time to share your knowledge 👏

[@viviennesmithdorf3244]

You are an EXCELLENT teacher, Chandeep! 😊 Thank you for making this video and making it freely available.

[@RichardJones73]

Sometimes i hate you cos you make power query look so easy and sometimes i love you because you make power query so much easier. Great job sir.

[@jist6953]

This is so advanced, it is beyond most of us. Watching over 5 different sessions, I think I can finally follow through the matrix. Wow

[@GoodlyChandeep]

😁🙏

[@torkunc]

dear chandeep, your way of explaining the issues is so clear, makes me think that pq is no more a nightmare. thank you…

[@kennethpaige7036]

Hi Chandeep, after weeks of trying I finally understand List.Accumulate! Thank you so much. The clarity of your List.Accumulate explanations is amazing.

[@GoodlyChandeep]

Glad it was helpful 💚

[@ShrikantPatil-x5h]

Chandeep, You are true rockstar. I feel blessed that I found your channel on youtube.. Keep rocking... 😊

[@abbadq]

Brilliant Chandeep, explained this complex technique with ease and such a simple way. Awesome video.

[@raimundojs9547]

Thank you! You've been the first one to teach this particular function with clear explanations. You have no idea how helpful your videos are.

[@GoodlyChandeep]

You have no idea how much your comment means to me :)

[@sandipsoni4047]

Chandeep I really thanks for making such indepth video it clear list. Accumulate function concept

[@Sumanth1601]

Have seen many videos on list.accumulate. But none as clearly defined by you. Brilliant 👍🙂

[@GoodlyChandeep]

Thanks Sumanth! Glad you liked it :)

[@adrianhoraciosantanavaldes1908]

this is awesome, i love it, used it already a couple of times, but where i think can be used but haven't been able to is if i want to split into separate columns multiple dynamically, i have many data sets where the desired output would be a "main column" to their "related value", lets say for simplicity you have 4 columns, the "main column" where you have distinct values {lenght, depth, width} but they are not unique values; the next columns would be "mm.1" for the first value in mm, "mm.2" for the second value in mm, "mm.3" for the third value in mm, etc and the same thing for "in" and "ft", the table originally starts as "main column", "mm", "in", "ft". what i do normally is i group by the first column, the "main column" and then manually split the other columns into different columns, getting the desired output. now in my data its normally around the 15 columns ("mm", "in", "ft", "gauss", etc) and to do 15 times that is quite an issue. what this video gave me the idea was to have as seed the grouped table, and from there start to split. up till the present i haven't been able to make it work using the ideas of this video, anything i might be missing? thank you if you read this far and are willing to help btw

[@jaybuddhadev3543]

this concept was really tough but the way you explained made it very very easy. Thanks a lot

[@HachiAdachi]

🤯 I feel so powerful now with List.Accumulate in my toolbox! Thank you, Chandeep! 👏

[@GoodlyChandeep]

Awesome! 😁

[@joaorataoo]

Magnificent!!! I just don't know what is more magnificent, if the function, or your way of explaining it! The way you explain is a gift.

[@GoodlyChandeep]

Really Glad ! Thanks João!

[@efficiency365]

Thanks! Great stuff. Demystifying Power Query. Keep up the amazing work.

[@GoodlyChandeep]

Woah.. Thanks Man! 🙏

[@sachin.tandon]

Fantastic example, and very advanced! If I were to provide "critical feedback" to get you from a Gold Star to a Platinum Star, on par with Alberto Ferrari et all, it would be to spell out some of the "sometimes' hastily given, "end of sentence" explanations. I think you did it once or twice. Otherwise, I love your channel, and I love the ideas that you come up with. Great work!

[@ricardobunge5957]

Hi Chandeep - brilliant as usual! Very much like the graduated approach - makes it very easy to understand the complex examples. I can see many potential applications in our current portfolio... Thanks again!

[@GoodlyChandeep]

Glad you liked it!

[@sbatsia]

Clear and thorough teaching. You're an excellent tutor. Thank YOU.

[@GoodlyChandeep]

You're very welcome!

[@godwinsiabukandu2196]

This is genius. Couldn't find anything like this in any textbook.

[@bugsdenis547]

Nothing else than 😄 really usefull and well explained One detail a List.Distinct will avoid errors when a training has been done by multiple persons

[@user-gu8wb3ui5x]

Your way of explaining this list.accumulate is simply awesome. This is very powerful function!!

[@user-gu8wb3ui5x]

Thanks for the efforts you had put in here.

[@GoodlyChandeep]

Glad you like this A!

[@bodhanandannhattuvetty3179]

You are a very good teacher. Thank you very much for explaining complex things in a simple way.

[@GoodlyChandeep]

Glad you think so!

[@udusegbe]

Not just "absolutely gorgeous" but as well absolutely awesome! It took me quite a well to get a grip on this powerful PQ function (and still not mastered even) but your logical step by step approach makes it so easy. Thanks, Chandeep. I will definitely over my application but this time with an enlightened insight from goodly! 😀

[@chandeepchhabra]

Glad you enjoyed it Bare!

[@BillSzysz1]

Thanks for video, Chandeep 🙂 I am impressed by the clarity of the explanation of difficult parts of the issue 👍

[@GoodlyChandeep]

Hi Bill. I am honoured to have you here. thank you!

[@MichaelBrown-lw9kz]

I watched this video again. Chandeep is that dude. My goodness he has a talent for providing instruction.

[@excel-in-g]

Love this. Great example. It's one of those functions that I find hard to grasp what I can do with it. I now understand it's a lot more then I imagined.

[@GoodlyChandeep]

Cool!

[@GosCee]

Brilliant! Nicely done, Chandeep. Very well explained. I'm sure I'll find use for this immediately. Thank you very much.

[@GoodlyChandeep]

Sure! Glad you like it

[@TheTommySp]

"I'm gonna say :hey!..you are the best

[@kirstinlarson3880]

You are a great trainer!! Thank you for this easy to follow tutorial!❤❤❤❤❤

[@jimfitch]

I’ve watched several tutorials on List.Accumulate. This is the best by far. Thank you, Chandeep.

[@GoodlyChandeep]

Glad it helped 💚

[@ryanschumacher5149]

Thank you so much for sharing! Your approach through this powerful and complex function was extremely helpful and educational. I really appreciate that you started with the basics and then proceeded into a "real world" example. I learned a lot! 💓

[@GoodlyChandeep]

Glad it was helpful !

[@weav8060]

I used this to find the header row in messy files, looking for the row record that has the largest number of matches with a list of likely/expected column names... Comes up often in common mission-critical files 'compromised' header formats (starting location, multi-line, etc,)

[@sue_bayes]

Totally enjoyable, thank you Chandeep. Also using the Closing Balance analogy really helped with the explanation.😊

[@GoodlyChandeep]

Thanks Susan. Glad you enjoyed it :)

[@mrtfia]

This is insane! 🙌🏻🙌🏻 You are a god ! Thank you so much.

[@amitk1208]

Your explanation is wonderful one can easily understand even Complex formula

[@GoodlyChandeep]

Thanks 💚

[@williamarthur4801]

Looking forward to watching this, I've used it to create running totals but never really understood quite how it works.. I may have questions.. Enjoyed Promoting two rows to Headers, TableInsertRows could do with it's own show. Richard.

[@henryseah1162]

I learnt a lot from you. Thank you Chandeep!

[@sanjeevsoni6793]

Great Goodly!!, Made simple to under List.Accumulate,

[@GoodlyChandeep]

Thanks!

[@pratapindian8606]

Your videos are awesome. I have one problem sir. Please explain the reversal of the last example. For example if we have an OutputTable as our source and I want to concatenate column headers based on true or false values of each record. Complete reverse of this example. Thank you for your response.

[@timolff9239]

the quality of these videos are mind blowing.

[@GoodlyChandeep]

Glad you think so!

[@pawewrona9749]

In this last exercise, when you create new columns, you could simply do TextContains(Training, TrainingName), and save yourself splitting, and then couple of iterations

[@KamranMumtazAhmed]

Thank you for the comment. I tried your idea and the code became too small compared to what Chandeep taught in the video. let Source = Excel.CurrentWorkbook(){[Name="Table2"]}[Content], Result = List.Accumulate(TL, Source, (s,c) => Table.AddColumn(s,c, each Text.Contains([Training], c))) in Result Moreover, I took another precaution on the TainingList side and used the List.Distinct to remove duplication in the header names.

[@alphamaniac9411]

Awesome examples. You are now a go to person for me to help solve problems!

[@GoodlyChandeep]

Glad to help!

[@martyc5674]

I’m going to have to watch this a few times!! Nice work Chandeep!!

[@GoodlyChandeep]

Thank You Martin!

[@Oprimaita]

Really a great tutorial ! Thank you so much ! I’ m sure I will use in my job.

[@GoodlyChandeep]

Sure man!

[@enocharthur4322]

You're a really really great tutor!!!

[@GoodlyChandeep]

Thank you!

[@einoconsult5563]

Thanks Chandeep :) I just added a List.Sort on AllTrainings list to order the courses alphabetically, easier to read :)

[@umeshlangade9231]

Thank you so much Goodly for this masterpiece 😊

[@MichaelBrown-lw9kz]

You sir are a phenomenal instructor.

[@GoodlyChandeep]

Thanks Michael!

[@sumardjo]

Thanks your Tutorial Power Query Special thanks for sample file I Can step by step with sample file thanks very much

[@QasimAli-gy3nb]

You really really really knock it out chandeep.

[@GoodlyChandeep]

Thanks! 💚

[@ravamo0053]

Great video, it has helped me a lot, but I wonder, if I have in my dataset many of these columns that I have to map, would I have to make a table duplicating the original? it will not be heavy for powerbi

[@kimgraf4085]

Amazing. Brilliant stuff! Will take me a few watches to learn for sure!

[@GoodlyChandeep]

Thanks Kim!

[@janesheng7113]

This is amazing. Thank you!❤

[@navisalomi]

Great teacher...takes time to break things down.

[@GoodlyChandeep]

💚

[@poulpon1164]

Thank you! Brilliant and useful as usual!

[@alirezahossini463]

Absolutely is brilliant 👏. Best way to show the matrix .

[@GoodlyChandeep]

Thank You !

[@kot23]

Hey Chandeep, great video and very well-explained as well, helped to understand "(a,b) => function" in power query. Would it be possible to simply use Text.Contains() when decinding for True/False? (Did not go through all the comments, maybe I missed this question). Great job!

[@pavelfilippov-nt2ni]

Thank you for lesson! Marvelous!

[@mshparber]

AWESOME! Thanks! Closing Balance is a great sample!

[@GoodlyChandeep]

Glad you like it!

[@learningmadesimple347]

Love it love it love it... great job..

[@GoodlyChandeep]

Thanks 💚

[@mnowako]

What an amazing video. Hats off! Thanks a lot!

[@GoodlyChandeep]

Glad you like it!

[@seanys]

I’ve had university lecturers with teaching qualifications and PhDs in their field that don’t teach as well as Chandeep.

[@GoodlyChandeep]

Oh my god.. thank you so much 💗

[@MichaelBrown-lw9kz]

I always watch this video. In your original table no two people take the same training class. For instance, Rechet takes Power Query and Excel, but no other individual takes these two trainings; so when you create a list of all the training classes from the Training field you have a list of unique training classes. However if for example CJ trained in Trading and Excel then your list would have two instances of Excel. When this happens how do you get your list to have distinct values? In other words, how do you remove duplicates from a list?

[@sajadabdulcader5337]

Q- in ur example of mom and dad had same training events would this still work? Or do I need to do a list mandated with unique items ?

[@KamranMumtazAhmed]

Thank you for the great explanations.

[@emilmubarakshin49]

Amazing function and fantastic explanation

[@GoodlyChandeep]

Glad you liked it!

[@danishnawaz7504]

You are Amazing

[@ViktorSamosiuk-wu5fq]

so great tutorial!! Thank you so much!

[@MrKamranhaider0]

great sir learned a lot .I working on weighted average cost .I think this will solve my problem.

[@chandeepchhabra]

Awesome thanks

[@vinamrachandra9611]

Hi, Excellent introduction to List.Accumulate. I love your videos. How can I handle the case where a TrainingName occurs in more than one row? Add Column will fail. eg. Name Training Rehet Power Query, Excel CJ Trading, Excel

[@GoodlyChandeep]

While creating a list for training names, surround that with List.Distinct

[@vinamrachandra9611]

@@GoodlyChandeep Thanks. It worked. Simple solution. What I am not able to wrap my head around is that AddColumn is called for each row then how it works if that column is already there?

[@MacarServicios]

WOW Chandeep, Excelente! lo haces ver tan sencillo! me gustaría ver las otras diferentes soluciones que comentabas al principio del video. Un cordial saludo!

[@chandeepchhabra]

Gracias!

[@darwisyb]

Thanks.i thought i need watch your video more :)

[@bartomiejonak]

Hey - Excel Is Fun children keep the father's level and extract Power (Query) of current XL tools. Keep it goin PQ.

[@rond9222]

Great video! One question, how would you handle this is 2 people took the same training class - let's say someone else took the Excel class too?

[@chandeepchhabra]

I'd just use list.distinct while creating a list. Rest remains the same

[@cheikhhakim5864]

thank you Chandeep i m grateful

[@GoodlyChandeep]

You're most welcome

[@mohammedmanna3488]

Thanks a Lot sir I will try to used in Financial Area I need it

[@KjeldSeegert]

This is incredibly well explained. Thank you very much for. Is it possible to reflect a date (for example, when the training was completed) as a value instead of True or false? 25:58 Best regards Kjeld

[@sentralorigin]

@ 21:05 when you choose which table you want to add the columns to, how come you can't add it to "Source" since that's the table where we want the columns added to?

[@malchicken]

So helpful ^^, thank you 🙏.

[@odallamico]

Absolutely amazing !!!!!

[@thebhaskarjoshi]

Thanks for video, Chandeep 🙂amazing content as always

[@GoodlyChandeep]

Glad you like this 💚

[@dirkstaszak4838]

Oh man nice one again. 👍

[@GoodlyChandeep]

Thanks Man!

[@sebastienschoonjans9727]

You explain things so well

[@GoodlyChandeep]

Thank You !

[@sebastienschoonjans9727]

@@GoodlyChandeep would it be possible for me to ask you a question concerning a case using list.accumulate?

[@RohanGupta_LP]

Wowww. Thanks for the explanation.

[@kebincui]

Very well explained

[@GoodlyChandeep]

Glad you liked it!

[@nicopicco]

this is like the reduce() function on JavaScript. Interesting how this also uses arrow functions like the latest JS

[@DavidFowler-e7i]

It works better if the training list is enclosed in List.Distinct as this allows for multiple persons doing the same training.

[@krzysiekbanach3737]

Just WOW!!!! :D Thanks a lot!!!

[@noahhadro8213]

great video. do you have video that shows how I could accomplish the following? I have a list of 4 values. I need to turn that into a list of every possible combination. For example: if the original list is apple, banana, grape, pear. A new list is created and for each row it would contain a unique combination of the 4 original list items separated by commas. so the first row might show banana, apple, grape, pear.................. next row in the list might show grape, apple, banana, pear............ next grape, banana, apple pear..... etc. Thanks so much for the great content.

[@kesavaraju9652]

Nice Content really, Can we calculate Running Total with List.Accumulate function?

[@erivaldolopes632]

Hey Chandeep. Nice tut. I have a question though: if I wanted to split each row of a column by two different delimiters that show up in each row several times ( repeatedly). How do I do it using List.Accummulate? For e.g.: delimiter1"text...text"delimiter2 Delimiter1'text...text"delimiter2 Etc

[@chandeepchhabra]

If the delimiters are same use text.split

[@erivaldolopes632]

@@chandeepchhabra they are not. 1 row of data is like: $text1# $text2# $text3# And son Then 2 row of data ..... Where $ and # are the delimiters for example

[@chandeepchhabra]

@@erivaldolopes632 use text.betweendelimiters

[@sarveshdeshpande1772]

I like it …. Will try on my model very soon !!! Thanks Chandeep , you are awesome as usual 🫡

[@GoodlyChandeep]

All the best Sarvesh!