After you publish changes to a Power BI semantic model it can take a few minutes, sometimes up to an hour, for updates to the AI Instructions to be applied. This means if you’re testing Power BI ...

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

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 ...

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 ...

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… ...

Recently I was asked by a customer to do some tuning on an Excel workbook with a lot of Power Query queries in it. Although all of the data used in the queries was coming from tables in the workbook ...

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 ...

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 specif… ...

One of the most popular blog posts I have written in recent years is this post on how the RelativePath and Query options for the Web.Contents() M function can be used to allow datasets that use web ...

There are hundreds of different methods for generating a Date dimension table for use in Power Pivot: you can use TSQL, Excel formulas, import from the DateStream table in the Windows Azure ...