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Power Query Nested Data Types In Excel
A year ago support for nested data types in Excel was announced on the Excel blog, but the announcement didn’t have much detail about what nested data types are and the docs are quite vague too. I was...
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Understanding The “Evaluation resulted in a stack overflow” Error In Power...
If you’re writing your own M code in Power Query in Power BI or Excel you may run into the following error: Expression.Error: Evaluation resulted in a stack overflow and cannot continue. If you’re a...
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Reading Parquet Metadata In Power Query In Power BI
There’s a new M function in Power Query in Power BI that allows you to read the data from a Parquet file: Parquet.Metadata. It’s not documented yet and it’s currently marked as “intended for internal...
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Overhead Of Getting Relationship Columns In Power BI DirectQuery Mode
Many Power BI connectors for relational databases, such as the SQL Server connector, have an advanced option to control whether relationship columns are returned or not. By default this option is on....
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Power BI Paginated Reports That Connect To Web Services And Excel
By far the most exciting announcement for me this week was the new release of Power BI Report Builder that has Power Query built in, allowing you to connect to far more data sources in paginated...
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Displaying Azure Maps In A Power BI Paginated Report
The built-in mapping functionality in Power BI paginated reports is fairly basic. However the integration of Power Query into Power BI paginated reports gives you an interesting new way of creating...
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New Semi Join, Anti Join And Query Folding Functionality In Power Query
There are a couple of nice new features to do with table joins (or merges as they are known in M) and query folding in Power Query in the April release of Power BI Desktop that I want to highlight....
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Power BI/Data Books Roundup
It’s time for another short post on the free books that various authors have been kind enough to send me over the last few months. Full disclosure: these aren’t reviews as such, they’re more like free...
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Module.Versions Function In Power Query
The ever-vigilant folks on the internet have spotted that there’s a new M function in the latest versions of Power BI and Excel: Module.Versions. This function, at the time of writing, returns a...
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The “DataFormat.Error: File contains corrupted data” Error In Power Query
When you’re using Excel workbooks as a data source in Power Query in either Excel or Power BI you may encounter the following error when trying to connect: DataFormat.Error: File contains corrupted...
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