Unioning is a method for appending values (that is, rows) to tables. You can union tables if they have the same columns. Typical use case: longitudinal research with periodic data updates
Joining is a method for combining tables related by common fields (that is, common columns). The result of combining data using a join is a virtual table that extends horizontally by adding columns of data.
1. Login in on your Tableau public profile within Tableau 2. Publish your visualization/dashboard online 1. Extract data sources 2. Check visibility for pre-research 3. Set export options 4. Data protection compliance