You've loaded your data into Power BI. You've got the tables. Now what are you expected to do? Here's the thing most beginners skip: how your tables connect to each other is more important than the data inside them. A poorly structured model will give you wrong numbers, slow reports and a difficult time every time you try to add a new chart. This week we're covering the foundation of Power BI, data modeling . Specifically: what kinds of tables exist, how schemas work, what relationships...