A fallback schema view that is layered over detail data of a fallback table and is used to compare fallback data to the detail data of the associated base table
B.
A view that is layered over a dimension table and provides statistics on the data in the table
C.
A virtual star or snowflake schema layered over detail data maintained in fully-normalized base tables
D.
A virtual view that is layered over a metadata table and presents a view of a single attribute of the data
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