This is a dedicated watch page for a single video.
A research organization collects weather data from multiple sensor devices across various locations. The data is stored as CSV files in a central Amazon S3 bucket. The CSV files contain the same schema, with an observation date column to record when each reading was taken. The organization needs to perform ad-hoc queries on the data to filter and analyze based on the observation date. The solution must enable efficient querying. Which solution will meet this requirement with the LEAST operational overhead?