Learn how to choose between DAX and Power Query when a table needs to compute additional columns.
Article and download: https://sql.bi/439946/?aff=yt
How to learn DAX: https://www.sqlbi.com/guides/dax/?aff=yt
The definitive guide to DAX: https://www.sqlbi.com/books/the-definitive-guide-to-dax-2nd-edition/?aff=yt