Problem with REGEXP_SUBSTR and the desired results

Question

I have table like below:
USERNAME
DOCNAME
DESCRIPTION
user1
doc1
yes|no|none
user1
doc2
ok|not
user1
doc3
allryt
Now I want to display the table like below:
USERNAME
DOCNAME
DESCRIPTION
user1
doc1
yes
user1
doc1
no
user1
doc1
none
user1
doc2
ok
user1
doc2
not
user1
doc3
allryt
Now this is the query which I am executing to separate the rows:
SELECT a.*, REGEXP_SUBSTR (description, '[^|]+', 1, LEVEL, 'i') val
                 FROM (SELECT * FROM sample_table  WHERE username='user1') a
           CONNECT BY LEVEL <=
                         REGEXP_COUNT (description, '[^|]+')
But I am getting results like below (rows getting duplicated)
user1
doc1
yes|no|none
yes
user1
doc1
yes|no|none
no
user1
doc1
yes|no|none
none
user1
doc2
ok|not
not
user1
doc1
yes|no|none
none
user1
doc2
ok|not
ok
user1
doc1
yes|no|none
no
user1
doc1
yes|no|none
none
user1
doc2
ok|not
not
user1
doc1
yes|no|none
none
user1
doc3
allryt
allryt
user1
doc1
yes|no|none
no
user1
doc1
yes|no|none
none
user1
doc2
ok|not
not
user1
doc1
yes|no|none
none
Can anyone correct my query or modify it?

Answer 1

Try this
SQL> with t
  2  as
  3  (
  4  select 'user1' user_name, 'doc1' doc_name, 'yes|no|none' descr from dual union all
  5  select 'User1' user_name, 'doc2' doc_name, 'ok|not' descr from dual union all
  6  select 'user1' user_name, 'doc3' doc_name, 'allryt' descr from dual
  7  )
  8   select user_name
  9        , doc_name
10        , regexp_substr(descr, '[^\|]+', 1, level) descr
11     from t
12  connect by level <= length(descr) - length(replace(descr, '|')) + 1
13      and descr = prior descr
14      and prior sys_guid() is not null
15    order
16       by user_name
17        , doc_name
18        , level;
USER_ DOC_ DESCR
User1 doc2 ok
User1 doc2 not
user1 doc1 yes
user1 doc1 no
user1 doc1 none
user1 doc3 allryt
6 rows selected.