This column has nothing to do with the 'column key', correct?

Column key is the name of the column. For example, in the employee table, the column key would be 'employee_id', and column values will be the IDs like 455. 456, 457, etc.

Clustering key can contain multiple columns and the data stored will be sorted based on these col...

In cassandra, we have {key: value} Here are you saying key is combination of (row-key, column-key)? I am confused between clustering key and the column key. Are they related in any manner?

Column key is used to uniquely identify a column.

Primary key is used to uniquely identify a row and can contain multiple columns.

Clustering key is just a part of the primary key.

In the table discussed under 'Clustering keys', here are the keys:

The 'State' column...

Thanks for the example. A row is a container for columns referenced by primary key. I am not able to map "Components of a Cassandra row" diagram to the table shown under Clustering Keys.

Looks like the table under clustering keys doesn't show in column keys and column ...

Column keys are column names, e.g., State, City.

So the Cassandra data is stored as a collection of columns, where each column can be seen as a key-value pair:

State:CA, City:Sacramento, Zip:92403, ... State:CA, City:Sacramento, Zip:92250, ...

Each column is stored ...