Trying Cassandra CQL

Here is how to create a new column on the fly in Cassandra's CQL2:

cqlsh:Keyspace2> select * from users;

 user_name | birth_year | gender | password   | session_token | state

-----------+------------+--------+------------+---------------+-------

   jsmith3 |       null |   null |        200 |          null |  null

    jsmith |       1968 |   null |  ch@ngem3a |          null |  null

   jsmith2 |       1963 |   null | ch@ngem3a2 |          null |  null

cqlsh:Keyspace1> insert into users (KEY, x) values ('jsmith',100);
cqlsh:Keyspace1> select * from users;
 KEY,TEST | birth_year,1968 | gender,m
 KEY,TEST1 | birth_year,1968 | gender,f
 KEY,jsmith | x,100