Creating the map type 

Use a map when pairs of related elements must be stored as a key-value pair.

A map relates one item to another with a key-value pair. For each key, only one value may exist, and duplicates cannot be stored. Both the key and the value are designated with a data type.

Using the map type, you can store timestamp-related information in user profiles. Each element of the map is internally stored as a single column that you can modify, replace, delete, and query. Each element can have an individual time-to-live and expire when the TTL ends.

Procedure

Define teams in a table cyclist_teams. Each team listed in the map will have an integer data type for the year a cyclist belonged to the team and a textdata type for the team name. The map collection is specified with a map column name and the pair of data types enclosed in angle brackets.
cqlsh> CREATE TABLE cycling.cyclist_teams ( id UUID PRIMARY KEY, lastname text, firstname text, teams map<int,text> );