Power BI and Data Modeling

Data modeling in Power BI is basically about organizing your data properly so you can analyze it easily. Instead of just loading random tables, you structure them in a way that makes sense. This involves: Creating and defining tables Connecting them using relationships Choosing the right structure (schema) Combining data using joins Joins (When Combining Data): When working in Power Query or SQL, joins help you decide how two tables should be combined: INNER JOIN: Only returns matching data in both tables LEFT JOIN: All data from the left table + matches from the right RIGHT JOIN: All data from the right table + matches from the left FULL OUTER JOIN: Everything from both tables, matched where possible LEFT ANTI JOIN: Data in left table with no match in right RIGHT ANTI JOIN: Data in right table with no match in left In Power BI, you do this by: Going to Power Query: Home: Merge Queries Selecting your tables and the type of join Relationships (How Tables Connect): After loading data, yo