A data warehouse is said to contain a time-varying collection of data because ___.
A. its contents vary automatically with time.
B. its lifespan is very limited.
C. it contains historical data.
D. its content has explicit stamp.
Answer:C
A data warehouse is said to contain a time-varying collection of data because ___.
A. its contents vary automatically with time. B. its lifespan is very limited. C. it contains historical data. D. its content has explicit stamp.