問題文
A modeler imports tables from a sales database into a semantic model. End users should work against names that hide the real database tables, and updates to the actual data should stay under control. Which object is built for that purpose?
選択肢
- A presentation table in the presentation layer, renamed after import, so that the real table drops out of sight and the source itself is never read again.
- An alias table in the physical layer, placed over a table that was imported, so that the real table is kept away from report authors and so that changes to what it holds remain governed.
- A logical table source in the logical layer, mapped to the table that was imported, so that report authors read a label the modeler picked rather than the label the source carries.
- A subject area in the presentation layer, raised over a business model, where the right to reach whatever sits underneath is granted one entry at a time.