How to create unique id for users during extract from oracle xml - sql

Question

I have xmldata in my oracle DB, there are different applicants for a particular appID in my oracle DB. Note the appID is a field in the oracle table while the applicants are in the xmldata(I have multiple applicants in this xml) I would like to create a unique id for the applicants.
In the sample data, there are 3 applicants. how do I create unique ids in my select statement.
WITH t( xml ) AS
(
SELECT XMLType('<loanApplication xmlns="http://www.abcdef.com/Schema/FCX/1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<applicantGroup>
<applicantGroupTypeDd>0</applicantGroupTypeDd>
<applicant>
<asset>
<assetDescription>neweg</assetDescription>
<assetTypeDd>1</assetTypeDd>
<assetValue>1500.0</assetValue>
</asset>
<asset>
<assetDescription>RayM</assetDescription>
<assetTypeDd>6</assetTypeDd>
<assetValue>60000</assetValue>
</asset>
<asset>
<assetDescription>TDC</assetDescription>
<assetTypeDd>8</assetTypeDd>
<assetValue>100</assetValue>
</asset>
<asset>
<assetDescription>2007 Hyundai</assetDescription>
<assetTypeDd>4</assetTypeDd>
<assetValue>2500</assetValue>
</asset>
</applicant>
</applicantGroup>
<applicantGroup>
<applicantGroupTypeDd>1</applicantGroupTypeDd>
<applicant>
<asset>
<assetDescription>neweg</assetDescription>
<assetTypeDd>2</assetTypeDd>
<assetValue>15000.0</assetValue>
</asset>
<asset>
<assetDescription>Bay</assetDescription>
<assetTypeDd>6</assetTypeDd>
<assetValue>60000</assetValue>
</asset>
<asset>
<assetDescription>TDC</assetDescription>
<assetTypeDd>9</assetTypeDd>
<assetValue>100</assetValue>
</asset>
<asset>
<assetDescription>2007 car</assetDescription>
<assetTypeDd>3</assetTypeDd>
<assetValue>2500</assetValue>
</asset>
</applicant>
</applicantGroup>
<applicantGroup>
<applicantGroupTypeDd>3</applicantGroupTypeDd>
<applicant>
<asset>
<assetDescription>neweg</assetDescription>
<assetTypeDd>6</assetTypeDd>
<assetValue>100.0</assetValue>
</asset>
<asset>
<assetDescription>RayM</assetDescription>
<assetTypeDd>8</assetTypeDd>
<assetValue>60000</assetValue>
</asset>
<asset>
<assetDescription>TDC</assetDescription>
<assetTypeDd>7</assetTypeDd>
<assetValue>100</assetValue>
</asset>
<asset>
<assetDescription>2007 Hyundai</assetDescription>
<assetTypeDd>5</assetTypeDd>
<assetValue>2500</assetValue>
</asset>
</applicant>
</applicantGroup>
</loanApplication>')
FROM dual
)
SELECT JSON_OBJECT (
KEY 'Assets' value y.Assets
) assets
FROM t,
XMLTABLE(XMLNAMESPACES(DEFAULT 'http://www.abcdef.com/Schema/FCX/1'), '/loanApplication/applicantGroup/applicant/asset'
PASSING xml
COLUMNS
Assets INT PATH 'assetValue') y
Results, I need
AppId
applicantId
assetTypeDd
1
1
[1,6,8,4]
1
2
[1,2,6,9,3]
1
3
[3,6,8,7,5]
Thanks

Answer 1

Consider XPath's ancestor axis and count pf preceding-sibling since it appears one applicant node falls under each applicantGroup:
WITH t( xml_data ) AS
(
SELECT XMLType('<loanApplication xmlns="http://www.abcdef.com/Schema/FCX/1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<applicantGroup>
<applicantGroupTypeDd>0</applicantGroupTypeDd>
<applicant>
<asset>
<assetDescription>neweg</assetDescription>
<assetTypeDd>1</assetTypeDd>
<assetValue>1500.0</assetValue>
</asset>
<asset>
<assetDescription>RayM</assetDescription>
<assetTypeDd>6</assetTypeDd>
<assetValue>60000</assetValue>
</asset>
<asset>
<assetDescription>TDC</assetDescription>
<assetTypeDd>8</assetTypeDd>
<assetValue>100</assetValue>
</asset>
<asset>
<assetDescription>2007 Hyundai</assetDescription>
<assetTypeDd>4</assetTypeDd>
<assetValue>2500</assetValue>
</asset>
</applicant>
</applicantGroup>
<applicantGroup>
<applicantGroupTypeDd>1</applicantGroupTypeDd>
<applicant>
<asset>
<assetDescription>neweg</assetDescription>
<assetTypeDd>2</assetTypeDd>
<assetValue>15000.0</assetValue>
</asset>
<asset>
<assetDescription>Bay</assetDescription>
<assetTypeDd>6</assetTypeDd>
<assetValue>60000</assetValue>
</asset>
<asset>
<assetDescription>TDC</assetDescription>
<assetTypeDd>9</assetTypeDd>
<assetValue>100</assetValue>
</asset>
<asset>
<assetDescription>2007 car</assetDescription>
<assetTypeDd>3</assetTypeDd>
<assetValue>2500</assetValue>
</asset>
</applicant>
</applicantGroup>
<applicantGroup>
<applicantGroupTypeDd>3</applicantGroupTypeDd>
<applicant>
<asset>
<assetDescription>neweg</assetDescription>
<assetTypeDd>6</assetTypeDd>
<assetValue>100.0</assetValue>
</asset>
<asset>
<assetDescription>RayM</assetDescription>
<assetTypeDd>8</assetTypeDd>
<assetValue>60000</assetValue>
</asset>
<asset>
<assetDescription>TDC</assetDescription>
<assetTypeDd>7</assetTypeDd>
<assetValue>100</assetValue>
</asset>
<asset>
<assetDescription>2007 Hyundai</assetDescription>
<assetTypeDd>5</assetTypeDd>
<assetValue>2500</assetValue>
</asset>
</applicant>
</applicantGroup>
</loanApplication>')
FROM dual
)
SELECT y.ApplicantId AS "applicantId",
LISTAGG(y.AssetTypeDd, ',') AS "assetTypeDd",
LISTAGG(y.Assets, ',') AS "assets"
FROM t,
XMLTABLE(
XMLNAMESPACES('http://www.abcdef.com/Schema/FCX/1' AS "d",
DEFAULT 'http://www.abcdef.com/Schema/FCX/1'),
'//d:asset'
PASSING xml_data
COLUMNS
ApplicantId INT PATH 'count(ancestor::applicantGroup/preceding-sibling::*)+1',
AssetTypeDd INT PATH 'assetTypeDd',
Assets INT PATH 'assetValue'
) y
GROUP BY y.ApplicantId
ORDER BY y.ApplicantId
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