Help needed in extracting pipe delimited fields in a CLOB data type

Question

hi
i Had a table with clob field as shown below.
CREATE TABLE TRANSACTION_INFO
  TRASACTION_ID  CLOB,
  LOG_ID  NUMBER
Insert into TRANSACTION_INFO
   (TRASACTION_ID, LOG_ID)
Values
   ('354502002020910|000000610214609663||09/27/09 08:02:37|RNEW|DC25|MOTOROLA|8802939198', 123);
Insert into TRANSACTION_INFO
   (TRASACTION_ID, LOG_ID)
Values
   ('354599892020910|000000610214609663||09/27/10 08:12:47|SOLD|DC23||8802939198', 456);
COMMIT;As you can see Clob field is a pipe delimited data.Now i am able to extract the first two fields using the below querry.But it may be the right solution as
substring function fails if there is missing character in any on the fields.
Also when there is a null value in any of the fields,how can i be able to get as null value ? Basically i want to get the values in a delimited manner.
how can we do this ?
Select Substr (TRASACTION_ID, 1, Instr (TRASACTION_ID, '|')-1) field1,
        Substr (TRASACTION_ID, 17, Instr (TRASACTION_ID, '|')+2) field2              
  From TRANSACTION_INFO;
output should be like as shown
   FIELD1          FIELD2          FEILD3                 FEILD4
354502002020910     000000610214609663                  09/27/09 08:02:37
354599892020910     000000610214609663                  09/27/10 08:12:47Thanks
Rede

Answer 1

hi Michael
Thanks for the solution and its my bad not mention that there is a possibility of having a null value at the start of the record also which RPLACE function no longer works for this case.
For example
with transaction_info (trasaction_id, log_id)
     as (
select '354502002020910|000000610214609663||09/27/09 08:02:37|RNEW|DC25|MOTOROLA|8802939198', 123 from dual union all
select '354599892020910|000000610214609663||09/27/10 08:12:47|SOLD|DC23||8802939198', 456 from dual union all
select '|000000610214609663||09/27/10 08:12:47|SOLD|DC23||8802939198', 456 from dual
select trim(regexp_substr (trasaction_id, '[^|]+', 1, 1)) f1,
       trim(regexp_substr (trasaction_id, '[^|]+', 1, 2)) f2,
       trim(regexp_substr (trasaction_id, '[^|]+', 1, 3)) f3,
       trim(regexp_substr (trasaction_id, '[^|]+', 1, 4)) f4,
       trim(regexp_substr (trasaction_id, '[^|]+', 1, 5)) f5
  from (select replace (trasaction_id, '||', '| |') trasaction_id from transaction_info)
F1                   F2                   F3                   F4                   F5                 
354502002020910      000000610214609663                        09/27/09 08:02:37    RNEW               
354599892020910      000000610214609663                        09/27/10 08:12:47    SOLD  
000000610214609663                        09/27/10 08:12:47    SOLD Now the last record is wrongly created....