Using XMLAGG and GROUP BY

Question

Hello all,
Using XMLAGG and GROUP BY returns multiple groups, ex:
*<GROUP ID = 1>.....</GROUP>*
*<GROUP ID = 2>.....</GROUP>*
How can I aggregate the multiple results as follows;
<GROUPS>
*<GROUP ID = 1>.....</GROUP>*
*<GROUP ID = 2>.....</GROUP>*
</GROUPS>
Adding another XMLAGG to concatenate the result is not working.

Answer 1

ok It worked using this code:
SELECT
XMLELEMENT
EMP,
XMLAGG
XMLELEMENT
DEPT,
XMLATTRIBUTES(DEPTNO),
XMLAGG
XMLELEMENT
NAME,
ENAME
ORDER BY
ENAME
ORDER BY
DEPTNO
FROM
EMP
GROUP BY
DEPTNO;