List each owner's first name, last name, and the size of his for her dog.
create table owners (first_name varchar, last_name varchar, owner_id varchar, PRIMARY KEY (first_name)); create table dogs (size_code varchar, owner_id varchar, PRIMARY KEY (size_code))
select t1.first_name, t1.last_name, t2.size_code from owners as t1 join dogs as t2 on t1.owner_id = t2.owner_id