Oracle 按一行里某个字段里的值分割成多行进行展示

with t as (
            select '111,222,333' col from dual
      union all
      select '444,555,666' col from dual
        ) 
        select regexp_substr(col, '[^,]+', 1, level) AS SUBJECT_IDS
    from t
     connect by level <= regexp_count(col, '[^,]+')
     and col = prior col
     and prior dbms_random.value > 0