cql CREATE TABLE users (id UUID PRIMARY KEY, name TEXT, age INT); INSERT INTO users (id, name, age) VALUES (uuid(), 'Alice', 25); cql CREATE TABLE friendships (from_user UUID, to_user UUID, since TIMESTAMP, PRIMARY KEY (from_user, to_user)); INSERT INTO friendships (from_user, to_user, since) VALUES (uuid(), uuid(), '2021-01-01');