DynamoDB uses the JavaScript Object Notation (JSON) format to send the request to, and receive the response from, the DynamoDB endpoint. One important rule of thumb is that the DynamoDB endpoint gets this JSON request and parses it into its native format (which is not JSON). During this time, some data loss might occur because of compatibility issues. For example, JSON supports the date data type, but DynamoDB does not support it. So the JSON request should not have a DynamoDB incompatible data type. In order to avoid this situation, DynamoDB has already listed the allowed data types, and they are as follows:
S: This denotes theStringdata type to store strings such as"Kuppu"N: This denotes theNumberdata type to store numbers such as 2014SS: This denotes theStringSetdata type to store string sets such as{"Uchit", "Vyas"}NS: This denotes theNumberSetdata type to store number sets such as{2013, 2014}