cassandra的primary key, partition key, cluster key,

create table stackoverflow (
key text PRIMARY KEY,
data text
);

create table stackoverflow (
key_part_one text,
key_part_two int,
data text,
PRIMARY KEY(key_part_one, key_part_two)
);

create table stackoverflow (
k_part_one text,
k_part_two int,
k_clust_one text,
k_clust_two int,
k_clust_three uuid,
data text,
PRIMARY KEY((k_part_one,k_part_two), k_clust_one, k_clust_two, k_clust_three)
);