This is the last post of my join series and it's about how to create a Cartesian product table in DAX and in Power Query. If you are wondering what is Cartesian product, google it :) I'm joking come back here :) Okay, serious mode on. First I'd like to share Wikipedia's definition and visual to describe it: ' In mathematics, specifically set theory, the Cartesian product of two sets A and B, denoted A × B, is the set of all ordered pairs (a, b) where a is in A and b is in B. In terms of set-builder notation, that is:' My definition for Cartesian product (in Power BI) is taking two different tables and combining them with all possible pairs of rows. To get this result in DAX we can use CROSSJOIN function. Microsoft's definition for CROSSJOIN is: "Returns a table that contains the Cartesian product of all rows from all tables in the arguments. The columns in the new table are all the columns in all the argument tables." The syntax is pretty simple: ...
A blog about solving the problems that we face, while we're creating Power BI reports.