Data Preparation; First and Foremost Important Task in Power BI

I’ve talked about Data Preparation many times in conferences such as PASS Summit, BA Conference, and many other conferences. Every time I talk about this I realize how much more I need to explain this. Data Preparation tips are basic, but very important. In my opinion as someone who worked with BI systems more than ...

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Not Folding; the Black Hole of Power Query Performance

Have you ever thought does your Power Query Transformations happens in the data source side (server side), or on the local memory (client side)? When you use a relational data source, query can be run on the data source, but it depends on transformations. Some transformations can be translated to query language of the data ...

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Make Your Numeric Division Faultless in Power Query

When you work with data it is normal that you apply numeric calculations. Numeric calculations in Power Query depends on the nature of data returns different results. One of the most error prone calculations is division. Power Query behave differently when you divide a number by zero, zero by zero, number by null, and non-numeric ...

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Power Query Library of Functions; Shared Keyword

As I mentioned earlier in Power BI online book, Power Query is a functional language. Knowing functions is your best helper when you work with a functional language. Fortunately Power Query both in Excel and Power BI can use shared keyword to reveal a document library of all functions. I’ve written about shared keyword almost ...

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