Which two statements are true about the advantages of using a data warehouse?

The correct answer is B. A data warehouse is typically implemented with a different design, making access faster. D. A data warehouse uses specialized features of the Oracle database, like materialized views and. Data warehouses often use denormalized or partially denormalized schemas (such as a star schema) to optimize query performance. Note: A materialized view is a pre-computed table comprising aggregated or joined data from fact and possibly dimension tables. Also known as a…

Introduction to Data Warehousing Concepts

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Options

AA data warehouse uses fewer database structures, so access to answers is faster and easier
BA data warehouse is typically implemented with a different design, making access faster.
CA data warehouse is optimized for ongoing write activity, making response faster.
DA data warehouse uses specialized features of the Oracle database, like materialized views and

How the community answered

(50 responses)

A
10% (5)
B
74% (37)
C
16% (8)

Explanation

Data warehouses often use denormalized or partially denormalized schemas (such as a star schema) to optimize query performance. Note: A materialized view is a pre-computed table comprising aggregated or joined data from fact and possibly dimension tables. Also known as a summary or aggregate table.

Topics

#data warehouse advantages#schema design#materialized views#query performance

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