A company stores 5 TB of data in Amazon S3 and wants to run occasional queries on it for analysis. Which AWS service is the most cost-effective choice for running these queries?
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Correct answer: Amazon Athena.
Why this is the answer
Amazon Athena is the most cost-effective choice because it is a serverless query service that allows you to analyze data directly in Amazon S3 using standard SQL. You only pay for the data scanned by your queries, making it highly cost-effective for occasional analysis of large datasets. Amazon Redshift is a data warehousing service designed for complex analytical queries on structured data, and it incurs continuous costs for provisioned clusters, making it less cost-effective for occasional use. Amazon Kinesis is a streaming data service, not for querying static data in S3. Amazon RDS is a relational database service, not designed for querying data directly in S3.
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