how to extract nested node values from JSON in ORACLE - sql

Question

I am trying to extract nested nodes from below Json(Stored in column named DOC as CLOB format) but it is coming blank.
{
"id": "a3ac3bec-4c4e-42c8-a11c-068f3dfda201",
"createdDateTime": "2021-08-31T18:00:44Z",
"userDisplayName": "abc",
"userPrincipalName": "sad2547#gmail.com",
"userId": "36a3a1f2-6133-4a0b-a6c9-020693ebdbd3",
"appId": "1fa516bf-1332-4140-85c9-d844d4e69ca1",
"appDisplayName": "ProxyIdentityExperienceFramework",
"ipAddress": "999.99.0.999",
"clientAppUsed": "Mobile Apps and Desktop clients",
"correlationId": "c478bdd4-1541-4cd0-bf7e-bd0695325246",
"conditionalAccessStatus": "notApplied",
"isInteractive": true,
"riskDetail": "hidden",
"riskLevelAggregated": "hidden",
"riskLevelDuringSignIn": "hidden",
"riskState": "none",
"riskEventTypes": [],
"riskEventTypes_v2": [],
"resourceDisplayName": "IdentityExperienceFramework",
"resourceId": "a3c649c7-5daa-4c3f-a5a0-a3fd7281ee20",
"status": {
"errorCode": 0,
"failureReason": "Other.",
"additionalDetails": null
},
"deviceDetail": {
"deviceId": "",
"displayName": "",
"operatingSystem": "Windows 10",
"browser": "Chrome 92.0.4515",
"isCompliant": false,
"isManaged": false,
"trustType": ""
},
"location": {
"city": "xyz",
"state": "def",
"countryOrRegion": "US",
"geoCoordinates": {
"altitude": null,
"latitude": 12.65875,
"longitude": -74.65286
}
},
"appliedConditionalAccessPolicies": []
}
Below is my query:
SELECT x.*
FROM demo_json a,
JSON_TABLE(doc, '$'
COLUMNS (
ids VARCHAR2(100) PATH '$.id',
NESTED PATH '$.deviceDetail.*' COLUMNS
(
browser VARCHAR2(100) PATH '$.browser'
)
)
) x;
Any suggestions to retrive all nested nodes from json?
Thanks

Answer 1

Your JSON contains an error(missing double quotes) in userPrincipalName: "userPrincipalName": sad2547#gmail.com, it should be "userPrincipalName": "sad2547#gmail.com",
It works fine if you fix it:
https://dbfiddle.uk/?rdbms=oracle_18&fiddle=d340a38b993f78170e04750e2aa8013c
with DEMO_JSON (doc) as (
select q'[
{
"id": "a3ac3bec-4c4e-42c8-a11c-068f3dfda201",
"createdDateTime": "2021-08-31T18:00:44Z",
"userDisplayName": "abc",
"userPrincipalName": "sad2547#gmail.com",
"userId": "36a3a1f2-6133-4a0b-a6c9-020693ebdbd3",
"appId": "1fa516bf-1332-4140-85c9-d844d4e69ca1",
"appDisplayName": "ProxyIdentityExperienceFramework",
"ipAddress": "999.99.0.999",
"clientAppUsed": "Mobile Apps and Desktop clients",
"correlationId": "c478bdd4-1541-4cd0-bf7e-bd0695325246",
"conditionalAccessStatus": "notApplied",
"isInteractive": true,
"riskDetail": "hidden",
"riskLevelAggregated": "hidden",
"riskLevelDuringSignIn": "hidden",
"riskState": "none",
"riskEventTypes": [],
"riskEventTypes_v2": [],
"resourceDisplayName": "IdentityExperienceFramework",
"resourceId": "a3c649c7-5daa-4c3f-a5a0-a3fd7281ee20",
"status": {
"errorCode": 0,
"failureReason": "Other.",
"additionalDetails": null
},
"deviceDetail": {
"deviceId": "",
"displayName": "",
"operatingSystem": "Windows 10",
"browser": "Chrome 92.0.4515",
"isCompliant": false,
"isManaged": false,
"trustType": ""
},
"location": {
"city": "xyz",
"state": "def",
"countryOrRegion": "US",
"geoCoordinates": {
"altitude": null,
"latitude": 12.65875,
"longitude": -74.65286
}
},
"appliedConditionalAccessPolicies": []
}]' doc from dual
)
SELECT
x.*
FROM DEMO_JSON a,
JSON_TABLE(a.DOC, '$'
COLUMNS (
IDs VARCHAR2(100) PATH id,
nested path deviceDetail columns(
browser path browser
)
)
) X;