12 August 2019
12 August 2019

Hiding What You Shouldn’t See

Back when I was working on a master’s degree, one of our professors told us a story about a colleague who learned how to navigate the Unix system. She was so thrilled about learning this new skill that, in her exuberance, she stumbled upon some hidden human resource files containing confidential information. Eventually, an administrator … Read more
31 July 2019
31 July 2019

Cracking DAX – the EARLIER and RANKX Functions

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So far in this series, Andy Brown of Wise Owl Training has shed light on functions like CALCULATE, VALUES and FILTER, but it’s only when you understand the idiosyncrasies of the EARLIER function that you can claim to have genuinely cracked DAX. This article gives four examples of the use of this peculiar function, in the process explaining why it has such a misleading name. Using the EARLIER function properly all boils down (as is so often the case with DAX) to understanding row and filter context. The article also shows how to use the RANKX function to sort data into your required order.… Read more
23 July 2019
23 July 2019

PolyBase in SQL Server 2019 – The End of ETL?

PolyBase has been around since 2016, but Microsoft is enhancing it in 2019 with the ability to connect to more data sources. You can now use PolyBase to connect to other SQL Server instances, and it’s easy to set up with a wizard. In this article Benjamin Weissman explains what’s new in PolyBase and walks you through setting it up and connecting to an external table.… Read more