DAX Median() Function Does Not Work On Tables With More Than 2 Billion Rows
An interesting – if obscure – fact I learned recently is that a small number of DAX functions such as Median() do not work on tables with more than 2 billion rows in Analysis Services Tabular, Azure AS and Power BI.
It’s quite easy to reproduce in Power BI. The following M expression returns a table with two billion and four rows: