This chapter is the second part of Cassandra data modeling. We have learned the basics of Cassandra Query Language (CQL), which offers a SQL-like language to implement a Cassandra data model and operate the data inside. Then a very detailed walkthrough, with ample examples of native data types, more advanced collections, and new user-defined and tuple types, was provided to help you know how to select appropriate data types for your data models. The internal storage of each data type was also explained to let you know how Cassandra implements its data types.

In the next chapter, we will learn another important element of a Cassandra query—indexes.