How to tokenize the result from a query

Question

Hi,
I need some help in writing a query or stored procedure for the following scenario
select rname from emp where username='user200';
This query will return the result,as comma separated,in the format r100,r101,r102
Now,I have to write another query using the above result like below
select place from loc where rname in ('r100','r101','r102');
Basically,I need to break the string 'r100,r101,r102' into 3 tokens.Can someone help me write a stored procedure or query for this?
Thanks
Ravi.

Answer 1

Ravi, Try this.
CREATE OR REPLACE procedure str_token
is
input_buffer varchar2(100);
var1 varchar2(10);
var2 varchar2(10);
var3 varchar2(10);
n1 number(4);
n2 number(4);
n3 number(4);
cursor c1 is
select place from loc1 where rname in (var1,var2,var3);
begin
select rname into input_buffer from emp1 where username='user200';
n1 := instr(input_buffer,',',1,1);
n2 := instr(input_buffer,',',1,2);
n3 := length(input_buffer) + 1 ;
select
substr(input_buffer,1,n1-1),
substr(input_buffer,n1+1,n2-n1-1),
substr(input_buffer,n2+1,n3-n2-1)
into var1, var2, var3
from dual;
for i in c1
loop
dbms_output.put_line('place:'||i.place);
end loop;
end;
Regs,
Karthik