SQL Server JSON Array - arrays

Question

I have some JSON that I would like to parse in SQL Server 2016. There is a hierarchy structure with arrays. I would like to write a query that parses the whole hierarchy more efficiently, I have challenges trying to access embedded arrays especially anything under "DealerPrefLocation", while I have no problems accessing anything under "DealerInformation", below is my sample JSON:
{
"DealerInformation": {
"Altername": [
{
"firstName": "two",
"lastName": "one",
"middleName": null,
"otherNameExplanation": "change"
}
],
"DealerType": {
"id": "87ab-098ng-2345li",
"name": "DMD"
},
"firstName": "PK",
"middleName": null,
"lastName": "KPK",
"primaryDealerState": "AP",
"otherDealerState": [
"AP",
"MP"]
},
"DealerPrefLocation": [
{
"PrefLocation": [
{
"address": {
"address1": "fort warangal",
"address2": "east",
"addressStandardizationSource": null,
"city": "warangal",
"country": "India"
},
"apptPhoneNumber": "989898989898",
"createdAt": null,
"phoneNumber": "989898989898"
}
],
"NonPrefLocation": [
{
"address": {
"address1": "fort Junction",
"address2": null,
"addressStandardizationSource": null
},
"createdAt": null,
"ServiceName": "H1",
"ServiceId": [
{
"ServiceGroupName": null,
"Type": "GROUP",
"ServiceNumber": "9999999"
}
]
}
],
"Inserted": null,
"Updated": null }
]
}
I did figure out how to query "DealerInformation" and arrays within it such as "AlterName" and "OtherDealerState", however I have challenges querying arrays under "DealerInformation"-->"PrefLocation"-->Address.
Please find my current query and output:
select
ID,
JSON_VALUE(VALUE_ID,'$.DealerInformation.firstName'),
JSON_VALUE(VALUE_ID,'$.DealerInformation.primaryDealerState'),
JSON_VALUE(A.VALUE,'$.firstName'),
JSON_VALUE(C.VALUE,'$.PrefLocation.address.address1')
from
Test_JSON_File
cross apply
openjson(Test_JSON_File.value_id,'$.DealerInformation.Altername')A
cross apply
openjson(Test_JSON_File.Test_JSON_CAQH.value_id,'$.DealerPrefLocation')C
The last column I selected is from "DealerPrefLocation" but I get only nulls, can someone help what am I missing in the SQL or what do I need to add?

Answer 1

Sorry, this answer is rather late...
I think, the most important information for you is the AS JSON within the WITH-clause. See how I use it:
DECLARE #json NVARCHAR(MAX) =
N' {
"DealerInformation": {
"Altername": [
{
"firstName": "two",
"lastName": "one",
"middleName": null,
"otherNameExplanation": "change"
}
],
"DealerType": {
"id": "87ab-098ng-2345li",
"name": "DMD"
},
"firstName": "PK",
"middleName": null,
"lastName": "KPK",
"primaryDealerState": "AP",
"otherDealerState": [
"AP",
"MP"]
},
"DealerPrefLocation": [
{
"PrefLocation": [
{
"address": {
"address1": "fort warangal",
"address2": "east",
"addressStandardizationSource": null,
"city": "warangal",
"country": "India"
},
"apptPhoneNumber": "989898989898",
"createdAt": null,
"phoneNumber": "989898989898"
}
],
"NonPrefLocation": [
{
"address": {
"address1": "fort Junction",
"address2": null,
"addressStandardizationSource": null
},
"createdAt": null,
"ServiceName": "H1",
"ServiceId": [
{
"ServiceGroupName": null,
"Type": "GROUP",
"ServiceNumber": "9999999"
}
]
}
],
"Inserted": null,
"Updated": null }
]
}';
--I'll pick at least one element out of each region. This should point you the way:
SELECT B.firstName
,B.middleName
,B.lastName
,JSON_VALUE(B.DealerType,'$.id') AS DealerTypeId
,B.PrimaryDealerState
,B.otherDealerState --You can dive deeper to parse that array
,JSON_VALUE(B.Altername,'$[0].firstName') AS Alter_firstName --there might be more...
,JSON_VALUE(C.PrefLocation,'$[0].address.address1') AS pref_address --there might be more...
,JSON_VALUE(C.PrefLocation,'$[0].apptPhoneNumber') AS pref_apptPhoneNumber
,JSON_VALUE(C.NonPrefLocation,'$[0].address.address1') AS nonpref_address --there might be more...
,JSON_VALUE(C.NonPrefLocation,'$[0].ServiceName') AS nonpref_ServiceName
FROM OPENJSON(#json)
WITH(DealerInformation NVARCHAR(MAX) AS JSON
,DealerPrefLocation NVARCHAR(MAX) AS JSON) A
OUTER APPLY OPENJSON(A.DealerInformation)
WITH(Altername NVARCHAR(MAX) AS JSON
,DealerType NVARCHAR(MAX) AS JSON
,firstName NVARCHAR(MAX)
,DealerType NVARCHAR(MAX) AS JSON
,middleName NVARCHAR(MAX)
,lastName NVARCHAR(MAX)
,primaryDealerState NVARCHAR(MAX)
,otherDealerState NVARCHAR(MAX) AS JSON) B
OUTER APPLY OPENJSON(A.DealerPrefLocation)
WITH(PrefLocation NVARCHAR(MAX) AS JSON
,NonPrefLocation NVARCHAR(MAX) AS JSON) C
UPDATE Select out of a table
Try this
SELECT B.firstName
,B.middleName
,B.lastName
,JSON_VALUE(B.DealerType,'$.id') AS DealerTypeId
,B.PrimaryDealerState
,B.otherDealerState --You can dive deeper to parse that array
,JSON_VALUE(B.Altername,'$[0].firstName') AS Alter_firstName --there might be more...
,JSON_VALUE(C.PrefLocation,'$[0].address.address1') AS pref_address --there might be more...
,JSON_VALUE(C.PrefLocation,'$[0].apptPhoneNumber') AS pref_apptPhoneNumber
,JSON_VALUE(C.NonPrefLocation,'$[0].address.address1') AS nonpref_address --there might be more...
,JSON_VALUE(C.NonPrefLocation,'$[0].ServiceName') AS nonpref_ServiceName
FROM Test_JSON_File
CROSS APPLY OPENJSON(value_id)
WITH(DealerInformation NVARCHAR(MAX) AS JSON
,DealerPrefLocation NVARCHAR(MAX) AS JSON) A
OUTER APPLY OPENJSON(A.DealerInformation)
WITH(Altername NVARCHAR(MAX) AS JSON
,DealerType NVARCHAR(MAX) AS JSON
,firstName NVARCHAR(MAX)
,DealerType NVARCHAR(MAX) AS JSON
,middleName NVARCHAR(MAX)
,lastName NVARCHAR(MAX)
,primaryDealerState NVARCHAR(MAX)
,otherDealerState NVARCHAR(MAX) AS JSON) B
OUTER APPLY OPENJSON(A.DealerPrefLocation)
WITH(PrefLocation NVARCHAR(MAX) AS JSON
,NonPrefLocation NVARCHAR(MAX) AS JSON) C;