XML Query filtering by child table column

Question

Hello,
If anyone can help with this one... it would be nice. I need to make the output of an query to be in the format of XML, but the problem is that the initial filtering needs to be done in the child table.
Example:
CREATE TABLE PRIMARY(
ID NUMBER(19,0),
CODE_PRIMARY VARCHAR2(32));
CREATE TABLE SECONDARY(
ID NUMBER(19,0),
IDPRIMARY(19,0),
CODE_SECONDARY VARCHAR2(32));
INSERT INTO PRIMARY(ID,CODE_PRIMARY)
VALUES (1,'A');
INSERT INTO PRIMARY(ID,CODE_PRIMARY)
VALUES (2,'B');
INSERT INTO SECONDARY(ID,IDPRIMARY,CODE_SECONDARY)
VALUES (1,1,'C');
INSERT INTO SECONDARY(ID,IDPRIMARY,CODE_SECONDARY)
VALUES (2,1,'D');
INSERT INTO SECONDARY(ID,IDPRIMARY,CODE_SECONDARY)
VALUES (3,2,'E');
Now what we need is to build an XML tree like the following, INNER JOINING PRIMARY and SECONDARY tables with this condition in the where clause -> WHERE SECONDARY.CODE IN ('C','D')
<result>
<record>
<id>1</id>
<code>A</code>
<childs>
<child>
<id>1</id>
<idprimary>1</idprimary>
<codesecondary>C</codesecondary>
</child>
<child>
<id>2</id>
<idprimary>1</idprimary>
<codesecondary>D</codesecondary>
</child>
</childs>
</record>
</result>
In this example only one record is returned since we only have one record in PRIMARY table that has a child having codesecondary=C or D. The ideia is to get many records... but I think that this is enough for the sake of the example. And the solution is the same.
Thanks in advance!
GM

Answer 1

Found the answer. Used distinct keyword instead of grouping the output table columns. This way XMLAgg didn't broke up the result:
SELECT
XMLElement("Processos",
XmlAgg(XMLElement("Processo",
XMLForest(T.ID as "Id",T.CODIGO as "Codigo",T.DESCRICAO as "Descricao"),
XMLElement("Funcionalidades",
SELECT
XMLAgg(
XMLElement("Funcionalidade",F2.ID)
FROM TWBASEDB.LISTA_UNICA_FUNCIONALIDADE F2
WHERE F2.ID_processo=T.ID
and f2.ACTIVIDADE IN ('1_ACTC1','1_ACTC2','1_ACTC3','2_ACTC1')
from
select distinct P.ID,P.CODIGO,p.DESCRICAO
FROM TWBASEDB.LISTA_UNICA_PROCESSOS P
INNER JOIN TWBASEDB.LISTA_UNICA_FUNCIONALIDADE F ON P.ID=F.ID_PROCESSO
WHERE ACTIVIDADE IN ('1_ACTC1','1_ACTC2','1_ACTC3','2_ACTC1')
order by p.id
) T