Create reports within pl/sql

Question

I would like to create a report with all of the sorting capabilities that a standard wizard generated report has, but I'd like to define the columns within a PL/SQL procedure or function. My goal is to return a set of records and for each record concatenate multiple rows from a second set of records based on each unique value from the first. But I want to present the data on one line.
For example:
query1 results
col1 = 1, col2 = A
col1 = 2, col2 = B
query2 results
col1 = A, col2=testA1
col1 = A, col2=testA2
col1 = B, col2=testB1
col1 = B, col2=testB2
col1 = B, col2=testB3
report should look like
col1=1, col2=A, col3=testA1-testA2
col1=2, col2=B, col3=testB1-testB2-testB3

Answer 1

I would suggest using the str2tbl function that Tom shows at http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:110612348061
and doing something like
select col1,col2,str2tbl(...)
from ...
group by col1,col2