A human resources company maintains a 10-node Amazon Redshift cluster to run analytics queries on the company's data. The Amazon Redshift cluster contains a product table and a transactions table, and both tables have a product_sku column. The tables are over 100 GB in size. The majority of queries run on both tables. Which distribution style should the company use for the two tables to achieve optimal query performance?
A) An EVEN distribution style for both tables
B) A KEY distribution style for both tables
C) An ALL distribution style for the product table and an EVEN distribution style for the transactions table
D) An EVEN distribution style for the product table and an KEY distribution style for the transactions table

Question

Quizplus · Accepted Answer

Using a KEY distribution style on the product_sku column for both tables ensures that rows with the same product_sku are stored on the same node, which minimizes data movement and optimizes query performance.

A Human Resources Company Maintains a 10-Node Amazon Redshift Cluster