Query to generate Nested XML feed

Question

Hello,
I use Oracle 11g R2 SOE....
I have two main tables
COMMERCIALS_PROPERTIES (com_id number PK , com_size number, project_id number, com_type number)
COM_PHOTOS (ID number PK , com_id number FK, content blob, mimetype varchar2)
Please, note the following has nothing to do with my problem:
CONTENT and MIMETYPE columns. Also, the lookup tables: PROJECTS , COM_TYPE
I Exposed a report as RESTful web service in XML format:
I am using this query to generate the XML 1 feed, but I need to tweak the query to generate XML 2 feed.
Is it possible, how to do it ???
Select
"COM"."COM_ID" as "COM_ID",
"COM"."COM_SIZE" as "SIZE",
"PROJECTS"."PROJECT_NAME_EN" as "PROJECT",
"COM_TYPES"."COM_TYPE" as "COM_TYPE",
'http://fam-erp.com/apex/erp/fateh/'||IMG.ID as "ImgURL"
FROM
COM_PHOTOS IMG inner join COMMERCIALS_PROPERTIES "COM"
on   IMG.COM_ID = COM.COM_ID
inner join "PROJECTS" "PROJECTS"
on "PROJECTS"."PROJECT_ID"="COM"."PROJECT_ID"
inner join "COM_TYPE_LOOKUP" "COM_TYPES"
on "COM_TYPES"."TYPE_ID"="COM"."COM_TYPE"
WHERE
  COM.COM_ID < 80 order by 1h1. XML 1
h2. Please look only at <COM_ID> and <ImgURL>
<ROWSET>
<ROW>
<COM_ID>77</COM_ID>
<SIZE>842</SIZE>
<PROJECT>Bayswater Tower</PROJECT>
<COM_TYPE>Office</COM_TYPE>
<ImgURL>http://fam-erp.com/apex/erp/fateh/1410</ImgURL>
</ROW>
<ROW>
<COM_ID>77</COM_ID>
<SIZE>842</SIZE>
<PROJECT>Bayswater Tower</PROJECT>
<COM_TYPE>Office</COM_TYPE>
<ImgURL>http://fam-erp.com/apex/erp/fateh/1412</ImgURL>
</ROW>
<ROW>
<COM_ID>78</COM_ID>
<SIZE>756</SIZE>
<PROJECT>Bayswater Tower</PROJECT>
<COM_TYPE>Office</COM_TYPE>
<ImgURL>http://fam-erp.com/apex/erp/fateh/1425</ImgURL>
</ROW>
<ROW>
<COM_ID>78</COM_ID>
<SIZE>756</SIZE>
<PROJECT>Bayswater Tower</PROJECT>
<COM_TYPE>Office</COM_TYPE>
<ImgURL>http://fam-erp.com/apex/erp/fateh/1429</ImgURL>
</ROW>
</ROWSET>---------------------------
h1. XML 2
h2. Please look only at <COM_ID> and <Images> and <ImgURL>
<ROWSET>
<ROW>
<COM_ID>77</COM_ID>
<SIZE>842</SIZE>
<PROJECT>Bayswater Tower</PROJECT>
<COM_TYPE>Office</COM_TYPE>
<Images>
      <ImgURL>http://fam-erp.com/apex/erp/fateh/1410</ImgURL>
      <ImgURL>http://fam-erp.com/apex/erp/fateh/1412</ImgURL>
</Images>
</ROW>
<ROW>
<COM_ID>78</COM_ID>
<SIZE>756</SIZE>
<PROJECT>Bayswater Tower</PROJECT>
<COM_TYPE>Office</COM_TYPE>
<Images>
        <ImgURL>http://fam-erp.com/apex/erp/fateh/1425</ImgURL>
        <ImgURL>http://fam-erp.com/apex/erp/fateh/1429</ImgURL>
</Images>
</ROW>
</ROWSET>

Answer 1

Hello,
I see, I found another solution, but come across another problem that is the web service should get Data from more than one table. I have this procedure, and I would like to *"UNION" its* Select Statement with another Select Statement:
declare
  v_xml clob;
  v_retval clob := '<?xml version="1.0" encoding="iso-8859-1"?>';
  v_blob blob;
begin
select
       xmlelement(
         "LISTINGS",
         xmlagg(
           xmlelement(
             "LISTING",
             xmlforest(
'RS-'||R."RES_ID" as "Property_Ref_No",
"UNIT_TYPE_LOOKUP"."UNIT_TYPE" as "Unit_Type",
'Sale' as "Ad_Type",
'Dubai' as "State",
L.LOCATION_NAME_EN AS "Community",
"PROJECTS"."PROJECT_NAME_EN" as "Property_Name",
"RES_SALE"."ASKING_PRICE" as "Price",
' ' as "Frequency",
ST."SUB_TYPE" as "Unit_Model",
R."RES_SIZE" as "Unit_Builtup_Area",
R.BEDS as "Bedrooms",
R.bath as "No_of_Bathrooms",
"RES_SALE"."AD_TITLE" as "Property_Title",
RES_SALE.DESCRIPTION as "Web_Remarks",
to_char("RES_SALE"."UPDATED_ON",'YYYY-MM-DD HH:MI:SSPM') as "Last_Updated",
R.VIDEO as "Web_Tour",
select xmlagg(
                             xmlforest(
                            'http://thevillaproject.com/apex/erp/IMAGES/'||IMG.ID AS "ImageUrl"
FROM      
      IMAGES IMG     
WHERE IMG.RES_ID = R.RES_ID ) Images )))).getclobval()
  into      v_xml
  FROM
      "RES_SALE" "RES_SALE"
inner join
      RES R on (R."RES_ID"="RES_SALE"."RES_ID")
inner join
          "UNIT_STATUS_LOOKUP" on (UNIT_STATUS_LOOKUP.status_id = "RES_SALE"."RES_STATUS")
inner join
      "PROJECTS" "PROJECTS" on ("PROJECTS"."PROJECT_ID"=R."PROJECT_ID")
inner join
      "UNIT_TYPE_LOOKUP" "UNIT_TYPE_LOOKUP" on ("UNIT_TYPE_LOOKUP"."TYPE_ID"=R."RES_TYPE")
inner join
      "RES_SUB_TYPE_LOOKUP" ST on (ST."SUB_TYPE_ID"=R."SUB_TYPE")
INNER JOIN
      COMPLEX_LOOKUP CL ON (CL.COMPLEX_ID = "PROJECTS".COMPLEX_ID)
INNER JOIN
      LOCATIONS L ON (L.LOCATION_ID = CL.LOCATION_ID)
WHERE  "RES_SALE".RES_status IN (5,8) AND "RES_SALE".LIVE = 'Y' AND "RES_SALE".DESCRIPTION IS NOT NULL
  dbms_lob.append(v_retval,v_xml);
  OWA_UTIL.Mime_Header('text/xml'); 
  htp.p('Content-length: ' || to_char(dbms_lob.getlength(v_retval)));
  htp.p('Content-Disposition:  inline; filename="Just.xml"');
  owa_util.http_header_close;
  v_blob := wwv_flow_utilities.clob_to_blob(v_retval);
  wpg_docload.download_file(v_blob);
end; h1. Select Statement that is needed to be "UNION-ED" with the Select Statement of the previous procedure:
select
       xmlelement(
         "LISTINGS",
         xmlagg(
           xmlelement(
             "LISTING",
             xmlforest(
'RR-'||R."RES_ID" as "Property_Ref_No",
"UNIT_TYPE_LOOKUP"."UNIT_TYPE" as "Unit_Type",
'Rent' as "Ad_Type",
'Dubai' as "State",
L.LOCATION_NAME_EN AS "Community",
"PROJECTS"."PROJECT_NAME_EN" as "Property_Name",
"RES_RENT"."ASKING_PRICE" as "Price",
' ' as "Frequency",
ST."SUB_TYPE" as "Unit_Model",
R."RES_SIZE" as "Unit_Builtup_Area",
R.BEDS as "Bedrooms",
R.bath as "No_of_Bathrooms",
"RES_RENT"."AD_TITLE" as "Property_Title",
"RES_RENT".DESCRIPTION as "Web_Remarks",
to_char("RES_RENT"."UPDATED_ON",'YYYY-MM-DD HH:MI:SSPM') as "Last_Updated",
R.VIDEO as "Web_Tour",
select xmlagg(
                             xmlforest(
                            'http://thevillaproject.com/apex/erp/IMAGES/'||IMG.ID AS "ImageUrl"
FROM      
      IMAGES IMG     
WHERE IMG.RES_ID = R.RES_ID ) Images ))))
FROM
      "RES_RENT" "RES_RENT"
inner join
      RES R on (R."RES_ID"="RES_RENT"."RES_ID")
inner join
          "UNIT_STATUS_LOOKUP" on (UNIT_STATUS_LOOKUP.status_id = "RES_RENT"."RES_STATUS")
inner join
      "PROJECTS" "PROJECTS" on ("PROJECTS"."PROJECT_ID"=R."PROJECT_ID")
inner join
      "UNIT_TYPE_LOOKUP" "UNIT_TYPE_LOOKUP" on ("UNIT_TYPE_LOOKUP"."TYPE_ID"=R."RES_TYPE")
inner join
      "RES_SUB_TYPE_LOOKUP" ST on (ST."SUB_TYPE_ID"=R."SUB_TYPE")
INNER JOIN
      COMPLEX_LOOKUP CL ON (CL.COMPLEX_ID = "PROJECTS".COMPLEX_ID)
INNER JOIN
      LOCATIONS L ON (L.LOCATION_ID = CL.LOCATION_ID)
WHERE  "RES_RENT".RES_status IN (5,8) AND "RES_RENT".LIVE = 'Y' AND "RES_RENT".DESCRIPTION IS NOT NULL