How to spilt the data in a column

Question

Dear all,
I have a column named users in a table.Users column varchar2 data type.
sample data:
select*from users_link;
Job_ID                             Users
101                               P00O0496,,P00O0828,P00O2739,P00O3522,P00O4405,P00O7182,P00U1375
102                               P00O0496,,P00O0828,P00O2739,P00O3522,P00O4405,P00U1375
103                               UUKGQ068,UUKGQ069,UUKGQ071,UUKGQ075,UUKGQ077,UUKGQ083,,,,UUMO12430Expected outcome:
If user want to users column to particular job_id then it should eliminate null values.every users spilt by comma. so my expected output look like,
for job_id 101
P00O0496
P00O0828
P00O2739
P00O3522
P00O4405
P00O7182
P00U1375
thanks and regards,
Sb

Answer 1

My database version is 9i. can I use "with clause " in this version.Yes, but you don't need it: It is just there to present some sample data. Actual the "real" table should be used:
SQL> select * from v$version where rownum = 1
BANNER                                                         
Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
1 row selected.
SQL> create table t as
select 101 job_id, 'P00O0496,,P00O0828,P00O2739,P00O3522,P00O4405,P00O7182,P00U1375' str from dual union all
select 102 job_id, 'P00O0496,,P00O0828,P00O2739,P00O3522,P00O4405,P00U1375' from dual union all
select 103 job_id, 'UUKGQ068,UUKGQ069,UUKGQ071,UUKGQ075,UUKGQ077,UUKGQ083,,,,UUMO12430' from dual
Table created.
SQL> select job_id, extractvalue(x.column_value,'e') str
  from t,
       table(xmlsequence(xmltype('<e><e>' || replace(str, ',', '</e><e>') || '</e></e>').extract('e/e'))) x
where extractvalue(x.column_value,'e') is not null
    JOB_ID STR                                    
       101 P00O0496                               
       101 P00O0828                               
       101 P00O2739                               
       101 P00O3522                               
       101 P00O4405                               
       101 P00O7182                               
       101 P00U1375                               
       102 P00O0496                               
       102 P00O0828                               
       102 P00O2739                               
       102 P00O3522                               
       102 P00O4405                               
       102 P00U1375                               
       103 UUKGQ068                               
       103 UUKGQ069                               
       103 UUKGQ071                               
       103 UUKGQ075                               
       103 UUKGQ077                               
       103 UUKGQ083                               
       103 UUMO12430                              
20 rows selected.