oracle表中某字段whole按分隔符;拆分为多行

SELECT ID,MONTH,WHOLE,
      REGEXP_SUBSTR(tab.whole, '[^;]+', 1, d.level_)  as part
  FROM

(SELECT ID,MONTH,
               WHOLE,
               regexp_count(whole, '[^;]+') AS cnt --取待分割字段每行按照分隔符';'分割后的记录数，用于connect by
          FROM test  ) tab,

(SELECT rownum as level_--产生一个1-待拆分字段分割后最大记录数的序列
        FROM (SELECT MAX(regexp_count(whole, '[^;]+')) AS max_len  FROM test )
        CONNECT BY level <= max_len) d

WHERE d.level_ <= tab.cnt --笛卡尔连接
order by id