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 ...

AI is meant to help us automate boring tasks, and what could be more boring than creating documentation for your Power BI semantic models? It’s such a tedious task that most people don’t bother; there ...

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 ...

I’ve done it for a few other groups over the last six months but this is the latest and best version, I think. I’ve worked with several customers using DirectQuery mode since I joined the CAT team and ...

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 ...

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 ...

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 ...

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 ...

The more you monitor something the more likely it is that you’ll see something strange you can’t explain. This is true of several customers I’ve spoken to recently who saw DAX queries run in the ...

My favourite – and it seems many other people’s favourite – new feature in the February 2022 Power BI Desktop release is support for more datasources (including SQL Server, Azure SQL DB and Synapse) ...