Database Reference
In-Depth Information
Anatomy of a single-column primary key
Now that you understand the distinction between a partition key and a clustering column,
you might be wondering which role the
username
column plays in the
users
table.
As it turns out, it's a partition key. All Cassandra tables must have a partition key; cluster-
ing columns are optional. In the
users
table, each row is its own tiny partition; no row is
grouped with any other.
