問題文
In Tableau's data connection canvas, an analyst drags two tables into the same logical table and sees a physical-layer view where they can define joins. What is the physical layer used for?
選択肢
- It is where data source filters are applied to the whole workbook.
- It is where extracts are configured for refresh scheduling.
- It is where tables are merged with joins or unions to form a single logical table at a fixed row level.
- It is where relationships are defined so tables stay separate until a view needs them, the physical canvas being just the newer name for that same behavior.