Querying tables in DynamoDB
You can use the Query API operation in Amazon DynamoDB to find items based on
        primary key values.
You must provide the name of the partition key attribute and a single value for that
        attribute. Query returns all items with that partition key value. Optionally,
        you can provide a sort key attribute and use a comparison operator to refine the search
        results.
For more information on how to use Query, such as the request syntax,
        response parameters, and additional examples, see Query in the
            Amazon DynamoDB API Reference.