A company has a data processing pipeline that runs multiple SQL queries in sequence against...

Amazon Web Services Data-Engineer-Associate Question Answer

A company has a data processing pipeline that runs multiple SQL queries in sequence against an Amazon Redshift cluster. After a merger, a query joining two large sales tables becomes slow. Table S1 has 10 billion records, Table S2 has 900 million records.

The query performance must improve.

Use the KEY distribution style for both sales tables. Select a low cardinality column to use for the join.

Use the KEY distribution style for both sales tables. Select a high cardinality column to use for the join.

Use the EVEN distribution style for Table S1. Use the ALL distribution style for Table S2.

Use the Amazon Redshift query optimizer to review and select optimizations to implement.

Use Amazon Redshift Advisor to review and select optimizations to implement.

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Update on: Dec 15, 2025
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A company has a data processing pipeline that runs multiple SQL queries in sequence against...

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