In this chapter, we talked in detail about various aspects of the DynamoDB data model. We started with understanding the hash key, the range key, and their usage: secondary indexes, and how to use them in your application; and then we talked about various data types used in DynamoDB. We also discussed how to perform various operations on tables, items, and attributes using Java, .NET, and PHP APIs.

Now that we have learned how to use DynamoDB, it's time to understand how things work in the actual background. In the next chapter, we will discuss the architectural details of DynamoDB.