The Execute Direct Query event has a duration of 2.1 seconds – meaning that again there is a gap to be explained, a gap where ...

Here’s what my custom visual showed with data from Performance Analyzer for the same DAX query: Now here’s the same visual with the tooltip from the Execute Direct Query event which shows some of the ...

As the saying goes, history doesn’t repeat itself but it rhymes. While 2025 has seen the excitement around new advances in AI continue to grow in data and analytics as much as anywhere else, it’s also ...

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 ...

I was looking at the list of M functions supported in custom connectors and not in Power BI Desktop (using the technique I blogged about here) in the latest version of the Power Query SDK when I came ...

One very common requirement when creating a Power BI report is the ability to apply a filter for the current day, week, month, quarter or year. There are several ways of implementing this: you could ...

One of the most confusing, under-documented and widely-misunderstood features of Power BI and Power Query (or Excel “Get & Transform” or whatever you want to call it) are the data privacy settings. I ...

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, ...

The Web.Contents() function in M is the key to getting data from web pages and web services, and has a number of useful – but badly documented – options that make it easier to construct urls for your ...

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 ...

The more advanced Power Query/M developers among you will know about query folding, the way that the Power Query engine pushes as much of the heavy-lifting of a query back to a data source. You may ...

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 ...