Oracle procedure logic - string manipulation

jknj72
jknj72 used Ask the Experts™
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I have a view where I have to do a little string manipulation. I have a text field where I just want to bring back the text in the field after the last pipe | . For instance '~(`|¤|football)~'
I just want to bring back football. There is commonality to the data because they all start with '~( and end with )~'. Also, the data that I need will always be after the last pipe |.
Another example would be '~(`|¤|{link:10098}|Mobile, Alabama,)~' would return
Mobile, Alabama,

Please let me know if you have any questions.

Thanks everyone
JK
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Muhammad Ahmad ImranDatabase Developer

Commented:
select substr(yrcol,instr(yrcol,'|',-1),instr(yrcol,')')-2) from yrtab

Author

Commented:
this            '~(`|¤|{link:10098}|Mobile, Alabama,)~'
returns       |Mobile, Alabama,)~

I think I still need a bit of tweaking

Author

Commented:
Really could use some help here........
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In MS SQL syntax it will be somethingn like

DECLARE @Str VARCHAR(MAX)
SET @Str = '~(`|¤|{link:10098}|Mobile, Alabama,)~'
--SET @Str =  '~(`|¤|football)~'

SELECT 
	 @Str
	,REPLACE(RIGHT(@Str, CHARINDEX('|', REVERSE(@Str))- 1), ')~', '')
	

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Dont have Oracle installed otherwise I would modify it
Most Valuable Expert 2011
Top Expert 2012

Commented:
regexp_substr(str,'.*\|(.+)\)~$',1,1,null,1)

Author

Commented:
I am getting an error executing ; regexp_substr(str,'.*\|(.+)\)~$',1,1,null,1)

  Execution (28: 8): ORA-00939: too many arguments for function

It seems that there are 6 arguments in your example and looking online I see examples that use are 4(?)

Any ideas?
awking00Information Technology Specialist

Commented:
sdstuber,
Would you be kind enough to explain the pattern match and what each of the remaining four parameters are? I typically think of the regexp_substr function as having a maximum of five parameters, the string expression, the pattern, the start position, the occurrence, and a match parameter but you're showing six. Great job, by the way!
awking00Information Technology Specialist

Commented:
It worked for me.
SQL> select * from txt;
TEXT
-------------------------------------------------------------
~(`|¤|football)~
~(`|¤|{link:10098}|Mobile, Alabama,)~

SQL> select regexp_substr(text,'.*\|(.+)\)~$',1,1,null,1)
  2  from txt;
REGEXP_SUBSTR(TEXT,'.*\|(.+)\)~$',1,1,NULL,1)
-------------------------------------------------------------
football
Mobile, Alabama,
Most Valuable Expert 2011
Top Expert 2012

Commented:
The last parameter (subexpression) is for 11gR2.  If you have a lower version you'll get the error you see.

the parameters are...

str,   - the string you are searcing
'.*\|(.+)\)~$'  - the regular expression describing what we are looking for
,1  - starting at the first character
,1 - find the first instance of the expression
,null - no special options like case insensitive or multi-line
,1 - return only the first subexpression
Most Valuable Expert 2011
Top Expert 2012
Commented:
this should work in 10g and above

REGEXP_REPLACE(REGEXP_SUBSTR(yrcol, '[^|)]+\)~$'), '\)~$')

or this...


 REPLACE(SUBSTR(yrcol, INSTR(yrcol, '|', -1) + 1), ')~')

Author

Commented:
Nicely done sdstuber!!  Thank you very much!!

Author

Commented:
great work
awking00Information Technology Specialist

Commented:
Thanks so much for the explanation. We recently upgraded to 11gR2, which was why it worked, but was looking at 11gR1 documentation. Regular expressions aren't very intuitive, but extremely powerful when you get them right :-)

Author

Commented:
I think I may have screwed up. Its not working 100%, I will post another question related to this one

Author

Commented:
please see ID: 27979957
awking00Information Technology Specialist

Commented:
This query takes all characters before the '~ (whether or not they exist) and concatenates them with the function sdstuber provided against all of the characters between the '~ and ~' and concatenates them with all of the characters after the ~'  (whether or not they exist), adding a space between the three parts then trimming any outside spaces -

select trim(substr(text,instr(text,'~'||chr(39)) + 2)||' '||
REPLACE(SUBSTR(REGEXP_SUBSTR(text, '~[^~]+~'), INSTR(REGEXP_SUBSTR(text, '~[^~]+~'), '|', -1) + 1), ')~')||' '||
substr(text,instr(text,'~'||chr(39)) + 2)) mystring
from txt;

MYSTRING
-------------------------------------------------------
football
Mobile, Alabama,
blahblahblah football blahblahblah
awking00Information Technology Specialist

Commented:
I meant to post this to your other question, which I have now done.

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