DEA-C01 Exam Dumps | A company uses Amazon Redshift as its data warehouse. Data encoding is applied to the existing tables

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Question 128/153

A company uses Amazon Redshift as its data warehouse. Data encoding is applied to the existing tables of the data warehouse. A data engineer discovers that the compression encoding applied to some of the tables is not the best fit for the data.
The data engineer needs to improve the data encoding for the tables that have sub-optimal encoding.
Which solution will meet this requirement?

A. Run the ANALYZE command against the identified tables. Manually update the compression encoding of columns based on the output of the command.

B. Run the ANALYZE COMPRESSION command against the identified tables. Manually update the compression encoding of columns based on the output of the command.

C. Run the VACUUM REINDEX command against the identified tables.

D. Run the VACUUM RECLUSTER command against the identified tables.

Correct Answer: B

The ANALYZE COMPRESSION command in Amazon Redshift evaluates the existing data in a table and suggests the most optimal compression encoding for each column. After running this command, the data engineer can manually update the table to apply the recommended compression encodings. This approach ensures the best fit for data compression, improving storage efficiency and query performance.
The ANALYZE command collects statistics for query optimization, but it does not provide compression encoding recommendations. It is focused on query performance, not data compression.
The VACUUM REINDEX command does not exist in Amazon Redshift. VACUUM commands are generally used for reclaiming disk space and sorting tables, not for compression optimization.
VACUUM RECLUSTER does not exist in Amazon Redshift. VACUUM operations focus on reorganizing and sorting data but do not address compression encoding.

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