Question 175

Your company is implementing a data warehouse using BigQuery, and you have been tasked with designing the data model. You move your on-premises sales data warehouse with a star data schema to BigQuery but notice performance issues when querying the data of the past 30 days. Based on Google's recommended practices, what should you do to speed up the query without increasing storage costs?

A. Denormalize the data.
B. Shard the data by customer ID.
C. Materialize the dimensional data in views.
D. Partition the data by transaction date.

D is the right answer because it does not increase storage costs.

A is not correct because denormalization typically increases the amount of storage needed.

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