Sort order for group by functions

Question

I have table TAB1(notenum number, linenum number, linetext varchar2(100)).
Each note can have multiple lines of text. Eg data
NOTENUM     LINENUM     LINETEXT
1     1     THIS IS LINE1.
1     2     THIS IS LINE2.
2     1     THIS IS LINE1 OF NOTE2.
2     2     THIS IS LINE2 OF NOTE2.
I need the text of lines of the most recent note (max notenum)
<Note>THIS IS LINE1 OF NOTE2. THIS IS LINE2 OF NOTE2</Note>.
I have a query like this
SELECT XMLAGG(XMLPARSE(CONTENT LINETEXT WELLFORMED))
FROM TAB1
GROUP BY NOTENUM
ORDER BY NOTENUM DESC
Above query would return the text of all lines concatenated for each note and the first row would be the one with highest notenum value.
My problem is that concatenation of the LINETEXT should happen in ascending order of LINENUM. Since LINENUM is not in GROUP BY clause I cannot specify it in ORDER BY.
How can I specify to XMLAGG (for that matter any group by function) to concatenate text in a specific order.
I hope I was able to explain my problem clear enough for somebody to help.
thanks for all the help
Message was edited by:
user448703
Message was edited by:
user448703

Answer 1

Never mind. I just found out that XMLAGG function has the option to specify ORDER BY. I think that will work.