Differences between GROUPBY and SUMMARIZE
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- Опубликовано: 14 авг 2023
- GROUPBY and SUMMARIZE seem similar, but they differ in both performance and functionalities. Choose the right one depending on specific scenarios!
Article and download: sql.bi/805881?aff=yt
How to learn DAX: www.sqlbi.com/guides/dax/?aff=yt
The definitive guide to DAX: www.sqlbi.com/books/the-defin... 
Наука
0:00 - 1:28 Intro
1:29 SUMMARIZE
6:47 ADDCOLUMNS
11:25 GROUPBY
19:22 Conclusions
20:20 Final Exercise to compare both functions
27:42 Out
I have found that the mix of groupby and summarise also comes really helpful when performing calculations over measures. For example finding the max result for a measure iterating over different groups of selected columns. This video will help me improve my calcs a lot!! Thank you!
Finally I have understood Groupby 😁
Thank you!
Man! Really NO WORDS for this Master Piece! Kidding! Actually I DO HAVE... This is another GOLD Pill of wise! Bravo Bravo! Thank you so much again!
This video is so helpful! A million thanks! Thank you Roberto, can’t wait to implement what I just learned! (it is especially helpful for me as a sql programmer, familiar with “group by”, but not with “summarize”, so I am really glad to learn the usage of both!)
❤
This is some gold content, Alberto. Your explanation videos give me motivation to dive into dax theory understanding.
Greetings from Brazil!
Brilliant and very insightful! Thank you Roberto for sharing your amazing knowledge.
just wanted to say thank you for the efforts in making this free tutorial
Brilliant. So many takeaways. I'm going to scan some of my complex models and see if I can improve performance with this knowledge.
As always, SQLBI is a diamond.
This is really helpful ! Thanks for explaining Summarize and Group By with such detail.
I'd been transferring your example to the Adventure Works model I have, got an error, played a bit more only for your comment at 2:10 LOL. Another great tutorial. Thanks
As always great content! 👍 Thank you.
very good video; good explanation about the difference, and what not to dom and nicely working towards upper level optimisation thinking.
It wouldn't hurt to smile on your Thumbnail Alberto :)
São videos como estes que você começa a assistir quando quer sair da simplicidade de uma linguagem. Entender tudo que está em volta do básico.
Perfeitamente, perfeito.
Muito obrigado.
thank you for this video, an important one for sure
In France, it is past midnight and I'm enjoying learning a lesson.... Are you coming from Pudlar? Cause you're Magic!
Brilliant Video. Thanks
Parabéns! Amei a explicação.
Golden tutorial 👌🏼
Fantastic Video.
Thx for this leason !!!
amazing !
great video
thank you
Genius ❤
So at about 7:40 you have brand total and overall total. If I understood correctly, you said not to use that method. So what would be the best way to produce the same result, and how would you add % of total for each brand?
Need some guidance. I have a table with 3 columns. Date, ID and amount. Amount contains both positive and negative amount datewise, idwise. If the sum of all id is positive, it is a debtor or else it is a creditor. A measure with IF condition is not going into a slicer to filter debtors apart from creditors. How do I do this ?
Hi can you help me with this (I have two dates like service date and post date if we select service date the data related to service date has to show if change the date to post date the data has to show by post date in the same page in power bi is it possible?)
I am having one doubt but not related to this content,
Using teatedas Dax I connected date table and fact table. When user want to drill fact table aggregation value it's not filter date table untill I drag & make active relationship in the model, Is any other alternative way there to achieve this ?
If I use this table to a table visual and have some slicers also, will be responsive to slicers? Do I need to make relationships? I tried it with summarizecolumns and didn't work and I couldn't create relationships also. Thank you so much! I have learned a lot from you!
At 26:55 SUMX is used whereas we really are performing a SUM of the column [@Sales]; is this done solely because we need to be able to add the CURRENTGROUP() as a table reference?
Thanks
Yes
Sorry but I don't see the difference between the "Transaction Size" local column in 10:35 and the local table with "A" and "B" as local columns in 18:41. Both of the cases are columns calculated on-the-fly, however, in the first case SUMMARIZE() works, and in second it doesn't.
Is this happening because of the Lineage as you say in 18:48?
Thanks to share, I have a question, whats the difference between local column and model column?
I think that I understand the different: Local column is a column that was created by dax, and Model column is a column that belongs to principal table. Please, I apreeciate if you could confirm. Thanks.
Confirmed!
Hi could you please explain, what is local column vs model column
Local column is created in a dax variable, model column is defined in the table (calculated columns are model columns).
@@SQLBI Thank you 👍
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