Generating rows from single column

Question

hi All,
I need u guys help for following issue.
Supose i have a table called parameters with following columns
TABLE - PARAMETERS;
desc PARAMETERS;
customer_id number(9)
params varchar2(3500)
say againt a customer id 100 data stored in params like below
X;Y;PP;CH;KK;RX:KY
My question is ..is it possible to have a SQL query that can split into multiple rows like below.
100 X
100 Y
100 PP
100 CH
100 KK
100 RX
100 KY
Basically i am looking for a solution with a general sql query with out writing plsql.
Thanks

Answer 1

I had the following in an old code archive which does what you want - assuming the semi-colon is the separator.... (hope the code tags format this correctly!)
with tmp as (
SELECT 100 as customer_id, 'X;Y;PP;CH;KK;RX;KY' as params FROM DUAL
UNION ALL
SELECT 200 as customer_id, 'UI;RT;QE' as params FROM DUAL
select t1.*,
trim(replace(substr(t1.params,mstart,(t2.mlevel-mstart)+1),';','')) as data_split
from tmp t1
join (
    select  customer_id,substr(params,level,1) as mchar,
            level as mlevel,nvl(lag(level) over (partition by customer_id order by level),0)+1 as mstart
    from tmp
    where substr(params,level,1)=';'
    or level=length(params)
    connect by level<=length(params)
    and prior customer_id=customer_id
    AND PRIOR DBMS_RANDOM.STRING ('p', 10) IS NOT NULL
    ) t2
on t1.customer_id=t2.customer_id