In yet another entry in my series on what you should be doing in Power BI Copilot AI Instructions, in this post I want to ...

Here’s yet another post in my series on things I think you should be doing in Power BI Copilot AI Instructions. Today: validating values that users enter as filters in their prompts. It’s something of ...

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 ...

One of the most common errors you'll see when working with Power Query in Power BI or Excel is this: Expression.Error: The key didn't match any rows in the table It can occur with almost any data ...

[Update September 2023: now that Power BI is part of Microsoft Fabric, the new features of Fabric make it much easier to solve this problem as described here] Power BI incremental refresh is a very ...

For any Power BI person, Direct Lake mode is the killer feature of Fabric. Import mode report performance (or near enough) direct on data from the lake, with none of the waiting around for data to ...

In the last two posts in this series I showed how removing columns from the tables used in a Power Query merge operation can improve refresh performance. In this post I’ll show you a different trick ...

Over the last few years one topic I have blogged about several times is how to link the detailed data about DAX query execution that can be found in Log Analytics – and now Workspace Monitoring – to ...

Dynamic M parameters are incredibly useful in Power BI when using DirectQuery mode because they allow you to pass values from your report direct to your data source query, bypassing Power BI’s own SQL ...

One of the factors that affects dataset refresh performance in Power BI is the number of objects that are refreshed in parallel. At the time of writing there is a default maximum of six objects that ...

When you connect to a relational database like SQL Server in Power BI/Power Query/Excel Get & Transform you have two choices about how to get the data you need: You can choose a table from the ...

Quite often, in Power Query, you want to ‘nest’ calculations and transformations – apply them not across the whole table, but repeat the same calculation or transformation across multiple groups of ...