Iterative query to fetch from one column and insert/update in another colum

Question

i have a table with 5 columns as shown below
Devicedetails
userid ip deviceid makeby makedate
123 100.00.20.11 | 00002011 xyz 10/11/2009
456 102.03.21.12 | 02032112 def 11/12/2009
678 null 02032112 def 11/12/2009
896 111.22.33.44 02032112 def 11/12/2009
in the above example i need to pick the value from deviceid - 022032112 and brake it in ot 02.03.21.12 (. after every tow digits) and prefix 1 (number one) at the end
i am trying to write using cursor below not getting any idea
1) I need to get the deviceid and subsctring it and update if the ip is there else insert

Answer 1

SELECT REGEXP_REPLACE
          ('022032112',
           '([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{1})',
           '\1.\2.\3.\4.1\5'
          ) TEST
  FROM DUAL
WHERE LENGTH ('022032112') = 9;o/p
TEST
02.20.32.11.12
SELECT REGEXP_REPLACE
          ('02032112',
           '([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})',
           '\1.\2.\3.1\4'
          ) TEST
  FROM DUAL
WHERE LENGTH ('02032112') = 8;Edited by: DeepakDevarapalli on Nov 11, 2009 10:57 AM