Substring from Clob or Blob column

I have a table with blob column which stores all comments entered by users for particular assest (asset01)

CommentHeaderuser1 CommentDate2014-08-15-14.48.14.000000
CommentDateStageNbr20StageNbrCommentHeaderCommentBodytest 1 - first test CommentBody

CommentHeaderuser2 CommentDate2014-08-15-14.13.08.000000
CommentDateStageNbr20StageNbrCommentHeaderCommentBodyTest 2 - Second TestCommentBody

User 1 entered comments test 1 - first test which is stored between commentbody and commentbody
User 2 eneterd Test 2 - Second Test which is stored between commentbody
How to query using sql to get these comments as seperate lines
Line 1 - Test 1 - FirstTest
Line 2 - Test 2 - Second Test


Table contains multiple assets and each asset will have comments stored in tags
raana jellaAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

sdstuberCommented:
SELECT REPLACE(
           REGEXP_SUBSTR(
               comments,
               'CommentBody.+CommentBody',
               1,
               x.COLUMN_VALUE
           ),
           'CommentBody'
       )
  FROM yourtable,
       TABLE(
           (SELECT COLLECT(LEVEL)
              FROM DUAL
            CONNECT BY LEVEL <= REGEXP_COUNT(yourtable.comments, 'CommentBody.+CommentBody'))
       ) x
 WHERE asset = 'asset01'
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
sdstuberCommented:
and another version that doesn't require regular expressions, but same basic idea


SELECT asset, SUBSTR(comments, s, e - s)
  FROM (SELECT asset,
               comments,
                 INSTR(
                     comments,
                     'CommentBody',
                     1,
                     COLUMN_VALUE * 2 - 1
                 )
               + LENGTH('CommentBody')
                   s,
               INSTR(
                   comments,
                   'CommentBody',
                   1,
                   COLUMN_VALUE * 2
               )
                   e
          FROM yourtable,
               TABLE(
                   (SELECT COLLECT(LEVEL)
                      FROM DUAL
                    CONNECT BY INSTR(
                                   comments,
                                   'CommentBody',
                                   1,
                                   LEVEL * 2
                               ) != 0)
               ) x
         WHERE asset = 'asset01');
0
raana jellaAuthor Commented:
Thank you,
I will try these solutions and will let you know
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.