How to combine rows?

Question

This is probably a basic question, but I am rather new to this, so please bear with me. I have a table that contains a field for comments, and the comments are broken into chunks, something like this:
COMMENT_TABLE:
ID DIA_ID SEQ TEXT
== ====== === ====
01 000100 0 First part of comment.
02 000100 1 Second part of comment.
03 000101 0 Next comment, part 1.
04 000101 1 Next comment, part 2.
05 000101 2 Next comment, part 3.
06 000102 0 Another comment.
07 000103 0 Still another comment.
I would like to be able to run SQL against this table to combine the comments and end up with something like this:
DIA_ID TEXT
====== ====
000100 First part of comment. Second part of comment.
000101 Next comment, part 1. Next comment, part 2. Next comment, part 3.
000102 Another comment.
000103 Still another comment.
Is this possible, and if so, could someone give me an example of how to specify the SQL to do this?
Thanks very much!

Answer 1

Try this
select count(*),
trim(substr(max(substr(sys_connect_by_path (p.TEXT,','),2)),1,100)) as c2,
p.DIA_ID
from (select DIA_ID,
TEXT,
row_number() over (partition by DIA_ID order by DIA_ID, TEXT) rn
from table1) p
start with p.rn = 1
connect by p.rn = prior p.rn + 1
and prior p.DIA_ID = p.DIA_ID
group by DIA_ID
order by count(*) desc;