How do I display Product Categories and Product Count Against each category in a tabular format?
Just like writing
SELECT c.Name AS Category, Count(p.ID) AS ProductCount
FROM Category c
INNER JOIN Product p ON c.ID = p.CategoryID
GROUP BY c.Name
And is it possible to even write SQL Queries in PowerBI? I use to do this in QlikView!
You should be able to add Category and ID to a table visualization. On the ID click the little down arrow and select "Count" (Values section of the table element on the right side menu).
I'm not familiar with QlikView. You can use SQL to get your data into Power BI from a source that supports it, but DAX is used to create measures and calculated columns within the model.