It appears it is just showing data in your 1.2 Patient history file. It is just showing fields. If you are doing union and if all other headers are same in other files, it would do UNION. But right now, it is showing data in current file .
1 of 1 people found this helpful
I don't think it's a new feature, but would really be stretching my ailing memory to remember when it wasn't there!
The reason is that all text files, within the same folder, are considered a "schema" in Tableau...which means you are able to Join/Union any files in that folder (from 10.0...(I think..could have been 10.1!) we can now Join across .csvs in different folders). This is similar to when you connect to a database table, but you can still see all the other Tables/Views/Stored Procedures within that Schema.
Hope that helps