The data in the Oracle column has multiple phone numbers separated by commas, how do I remove them separately?

ID number      
1       137xxxx,138xxxx
Take it out.
ID number    
1     137xxxx
1     138xxxx

create table test (id  int , phone varchar2(200)); insert into test  values (1, ‘13811111111,13311111111,13900000000‘ );

insertinto test values(2,‘15811111111,15911111111,18800000000‘);

select id,c  from ( with t  as ( select id,phone c  from test) select id,substr(t.ca,instr(t.ca,  ‘,‘ , 1, c.lv) + 1,instr(t.ca,  ‘,‘ , 1, c.lv + 1) - (instr(t.ca,  ‘,‘ , 1, c.lv) + 1))  AS c from ( select id, ‘,‘ || c ||  ‘,‘ AS ca,length(c ||  ‘,‘ ) - nvl(length( REPLACE (c,  ‘,‘ )),0)  AS cnt  FROM t) t, ( select LEVEL lv  from dual  CONNECT BY LEVEL <= 100) c  where c.lv <= t.cnt)  order by id

The data in the Oracle column has multiple phone numbers separated by commas, how do I remove them separately?