Store multiple values into a variable

Question

I was wondering if it was possible to store multiple values into one varaible. Something along the lines of...
Oracle: 10g
--Table xSample (this is obviously a dumbed down version of the table for the sake of showing what I want to accomplish
S_ID   YEAR
1         2009
2         2009
3         2009
4         2009
--Query
select     s_id
into       pID
from      xSample
where    year = 2009;Basically the reason I was trying to figure out how to store multiple values into a variable is b/c I was going to use that variable (pID) as a parameter and have it's values passed dynamically when the proc was called. The values would go into a query that would look something like:
select *
from cust_data
where person_id in (pID)
aka
select *
from cust_data
where person_id in (1,2,3,4)Not sure if this is possible, but if anyone knows of a way I could accomplish this that would be great.
Edited by: user652714 on Dec 23, 2009 9:37 AM

Answer 1

Here's a basic idea building a comma seperated list, then consuming it in another query (taking the in list approach from Tom's post, linked earlier).
create table xsample (s_id number not null, year number);
insert into xsample select level, 2009 from dual connect by level <=4;
commit;
declare
   --4000 should be lots ... hopefully?
   v_parameter_list varchar2(4000);
begin
  --create the comma seperated list
  select
    substr(max(sys_connect_by_path(s_id, ',') ), 2, 4000)
  into
    v_parameter_list
  from
    select s_id, row_number() over(order by 1) as rn
    from xsample
    where year = 2009
  start with rn = 1
  connect by prior rn = rn - 1;
  --consume the comma seperated list
  for x in
    with data as
      select
        trim( substr (txt,
        instr (txt, ',', 1, level  ) + 1,
        instr (txt, ',', 1, level+1)
        - instr (txt, ',', 1, level) -1 ) ) as token
      from
        select ','||v_parameter_list||',' txt
        from dual
      connect by level <= length(v_parameter_list)-length(replace(v_parameter_list,',',''))+1
    select *
    from xsample
    where s_id in (select * from data) 
  loop
    dbms_output.put_line('next item = ' || x.s_id);
  end loop;
end;
/