One of the most common errors you’ll see when working with Power Query in Power BI or Excel is this: It can occur with almost any data source and in a wide variety of different circumstances, and for ...

In the first two parts of this series (see here and here) I showed how Power BI/Power Query/Excel Get & Transform’s data privacy settings can influence whether query folding takes place or even ...

I don’t usually like to blog about topics that I think other people have blogged about already, but despite the fact that Mosha blogged about this several years ago (in fact more than eight years ago, ...

There are a lot of articles and blog posts out there on how to handle OAuth2 authentication when connecting to REST APIs from Power Query in Power BI. However there is also a lot of confusion and ...

My posts from two weeks ago (see here and here) on using Process Monitor to troubleshoot the performance of Power Query queries made me wonder about another question: how does the performance of ...

When using the Web.Contents function to call a web service in Power Query in either Power BI or Excel you may encounter the following error: DataFormat.Error: Block length does not match with its ...

A long time ago someone – probably from the Power Query dev team – told me that adding primary keys to M tables could improve the performance of certain transformations in Power BI and Excel Power ...

You probably know that semantic models in Power BI can use a fixed amount of memory. This is true of all types of semantic model – Import, Direct Lake and DirectQuery – but it’s not something you ...

So far in this series (see part 1, part 2 and part 3) I’ve looked at how you can create a Power Automate custom connector that uses the Power BI Enhanced Refresh API to kick off a dataset refresh.

In my recent post on web services in Power Query I mentioned that while the Power Query Web.Contents() function generates a GET request by default, you can make it generate a POST request by ...