Reading JSON data with nested obects within arrays to SQL Server 2016 - sql

Question

I'm stuck trying to read the below JSON data into SQL Server 2016. I can't return any values from the Values object onwards.
The select statement shows NULL values for binWidth, minVal, nBins and type.
Also, I'm unsure how to deal with the result array as the values do not have any keys assigned.
Any help much appreciated.
JSON data:
DECLARE #json NVARCHAR(MAX) =
'{
"Histograms": [
{
"Name": "20458-Z01-DWL",
"RegisterId": "0",
"Tags": [],
"UUID": "a4c5fa3f-ecb8-4635-8e94-5167e743b518",
"Values": [
{
"config": {
"binWidth": 50,
"minVal": 50,
"nBins": 18,
"type": "total wait"
},
"result": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
}
]
},
{
"Name": "20458-Z02-DWL",
"RegisterId": "1",
"Tags": [],
"UUID": "95d57826-30f6-44c9-ad0d-6a24684fcaed",
"Values": [
{
"config": {
"binWidth": 50,
"minVal": 50,
"nBins": 18,
"type": "total wait"
},
"result": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
}
]
},
{
"Name": "20458-Z03-DWL",
"RegisterId": "2",
"Tags": [],
"UUID": "90223a0e-3d1a-471f-a871-ee56da4799f5",
"Values": [
{
"config": {
"binWidth": 50,
"minVal": 50,
"nBins": 18,
"type": "total wait"
},
"result": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
}
]
},
{
"Name": "20458-Z04-DWL",
"RegisterId": "3",
"Tags": [],
"UUID": "6c837def-feeb-48d5-8dcf-307b56ec44e9",
"Values": [
{
"config": {
"binWidth": 50,
"minVal": 100,
"nBins": 16,
"type": "total wait"
},
"result": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
}
]
},
{
"Name": "20458-Z05-DWL",
"RegisterId": "4",
"Tags": [],
"UUID": "76bd5aa2-8860-4a2e-997d-3c83e940790f",
"Values": [
{
"config": {
"binWidth": 50,
"minVal": 100,
"nBins": 16,
"type": "total wait"
},
"result": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
}
]
}
],
"LogEntryId": 6593,
"StartTimestamp": "2020-07-20T16:05:00Z",
"Timestamp": "2020-07-20T16:06:00Z"
}'
Query to fetch items from data:
SELECT
[Name],
[RegisterId],
UUID,
binWidth
minVal,
nBins,
[type]
FROM
OPENJSON (#json, '$.Histograms')
WITH
([Name] nvarchar(100),
[RegisterId] nvarchar(100),
UUID nvarchar(100),
[Values] nvarchar(max) AS json) AS Histograms
CROSS APPLY
OPENJSON (Histograms.[Values])
WITH
(binWidth int,
minVal int,
nBins int,
[type] nvarchar(100)) AS config

Answer 1

Figured out the last question re. passing result array into one field - edit below. Thanks again for your guidance, have learnt a lot!
select
Histograms.[Name],
Histograms.[RegisterId],
Histograms.UUID,
config.binWidth,
config.minVal,
config.nBins,
config.[type],
r.[key] as 'result position',
r.[value] as 'result value'
from
openjson(#json, '$.Histograms')
with (
[Name] nvarchar(100),
LogEntryId int,
[RegisterId] nvarchar(100),
UUID nvarchar(100),
[Values] nvarchar(max) as json
) as Histograms
cross apply openjson (Histograms.[Values]) h
cross apply openjson (h.value)
with
(
binWidth int N'$.config.binWidth',
minVal int N'$.config.minVal',
nBins int N'$.config.nBins',
[type] nvarchar(100) N'$.config.type',
result nvarchar(max) as json
) as config
CROSS APPLY OPENJSON(config.result) r