Power BI Copilot knows about the relationship between measures and tables, which means that it’s very good at knowing which ...

Power BI Copilot knows about the relationship between measures and tables, which means that it’s very good at knowing which measures can be broken down by which columns. For example, consider the ...

A blog about Microsoft Fabric, Power BI, SQL Server Analysis Services (Multidimensional and Tabular), MDX, DAX, Power Pivot, Power Query and Excel for BI ...

Gives the same result as without the AI Instructions: BUT – even though Copilot asked what “recently” meant, it still went ...

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 coul… ...

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 almos… ...

Recently I had a request for help from someone who wanted to do the following in Power Query: take a piece of text and then, using a table, search for all of the occurrences of the words in one column ...

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 yo… ...

Last year I blogged about how to introduce a delay between web service requests in M code. Since then a new function has been added to Power Query which makes this a lot easier: Function.InvokeAfter() ...

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 ...

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 ...

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 ...