Regular expression in oracle

I need a regular expression in sql that truncates everything after the dash and including the dash.

For example:

I have 49858974-94984985
result 49858974

I have found some examples but not exactly what I need.
meagain0707Asked:
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.

slightwv (䄆 Netminder) Commented:
Are all the numbers first?

select regexp_substr('49858974-94984985','[0-9]*') from dual;


If this doesn't work, please provide more samples.
0
meagain0707Author Commented:
I think this will work. I will  let you know the results on Monday. Thank you.
0
SujithData ArchitectCommented:
If your string is not just numbers, use this

SQL> select regexp_substr('test-this', '[^-]+')
  2  from dual;

REGE
----
test

SQL>
SQL> select regexp_substr('49858974-94984985', '[^-]+')
  2  from dual;

REGEXP_S
--------
49858974

SQL>

Open in new window

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
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

Guy Hengel [angelIII / a3]Billing EngineerCommented:
hmmm. do we really need regular expression? would a plain substr not be more efficient?
just curious:

select substr(yourfield, 0, instr(yourfield || '-', '-')-1) from yourtable 

Open in new window

0
meagain0707Author Commented:
Thanks angelIII

The problem with the instr code you gave me is if the number starts  with -
then nothing is returned.
The reg. exp. still retuns the number after the -.
0
slightwv (䄆 Netminder) Commented:
>>if the number starts  with -

This is a new requirement.  Do you have any other requirements that you have not mentioned?

Would you not want the '-' returned?

If so try:
regexp_substr('-49858974-94984985','-?[0-9]*')
0
SujithData ArchitectCommented:
have you tried my post

SQL> select regexp_substr('-49858974-94984985', '[^-]+') from dual;

REGEXP_S
--------
49858974

SQL> select regexp_substr('49858974-94984985', '[^-]+') from dual;

REGEXP_S
--------
49858974

SQL> select regexp_substr('49858974-', '[^-]+') from dual;

REGEXP_S
--------
49858974

SQL>

Open in new window

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.