Learn how Table.Buffer Power Query 'M' function improved the dataset refresh time - Power BI

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Obtaining clean, well-structured data for your analytics and reporting needs is often a challenging task. Data doesn't always come in the perfect format for building a scalable and efficient data model. This is where Power Query comes into play, allowing us to transform and shape the data to align with our reporting requirements. However, these transformations can sometimes come at a high cost - they may lead to extended refresh times for your datasets.

In this enlightening video, we embark on a journey through the optimization of a dataset refresh process. Initially, the refresh was a laborious task, taking more than 2 hours due to specific data transformations. It was clear that something needed to change to make this process more efficient. Fortunately, the Table.Buffer function emerged as the hero of our story, reducing the refresh time to a mere fraction, clocking in at less than a minute.

Throughout this video, we will cover:

👉 The specific data transformations that were essential for our reporting needs
👉 A deep dive into the reasons behind these transformations - understanding the 'why'
👉 A step-by-step demonstration of how the TABLE.BUFFER function was leveraged to revolutionize the refresh process, making it blazing fast

Join us on this captivating journey, where we uncover the hidden gems of data transformation, optimization, and efficiency. Learn how to supercharge your data model refresh and save valuable time in this information-packed video.

Enjoy!!

[sukoi]

Beautiful content it is. Thank you very much.

[princecena]

Great use of this function. I think it is made for such kind of scenarios, where one has to iterate the table to check conditions. Great stuff and use case based video.

[javedkhan-tzfn]

I was looking for this kind of solution thanks

[NaraMeerammaTrust]

We all love your videos on Power BI and Power Query. I an a regular follower of oyur videos and content.
The way you explain the issue and usage of each function is amazing.
One small request that Could you please share .PBIX File to practice or else
can you give access to these .PBIX Files if they are available on your website?
Please reply back with your response to this request

[Timbollew]

This looks great and I believe will resolve many issues I have where I use Power Query to load data from SharePoint data sources that hold CSVs, workbooks, etc. I'm not very familiar with using functions though, how would one use this without using functions?

[JohnKpl]

Very interesting!
I am trying to reduce Power Query time to load multiple times the same CSV. With no luck
Is it possible? Load once and then copy results-only to another tables?

[johno]

Great advice. Does this make having a computer with larger RAM a big advantage?
i.e. Microsoft state it may make you queries run slower due to storing the buffered query in memory but more RAM on PC would fix this (I am really struggling with slow PQ connecting to Dataverse since my company moved to D365 CRM)

[spencerhoyle]

I am adding a buffer table into my function, similar to you. But the time is extremely slower than without the Table.Buffer. Any thoughts on why this is?

[udanial]

Can u please share your file so I will be beneficial for all of us.

[warrenanderson]

Could you PLEASE just explain your videos with simple examples??? Also, it would be helpful if you walked us thru by building the querry instead of showing the final results 😢