What is the purpose of a primary key in DynamoDB?

It is used to uniquely identify each item in a table. It also helps dynamodb organize & distribute data across its storage system for fast access.
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Lifecycle rules are used in S3 to either transition between the storage classes or for the expiration of objects
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The world is changing faster than ever. From self-driving cars and intelligent chatbots to real-time data analytics and global-scale applica..
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