How to Parse JSON Arrays to SQL SERVER 2016 - json

Question

I'm looking to create a table of data (see "Output Table") from the below JSON. I can't seem to get to the "final mile". Can someone show me the way to properly handle the parsing of the arrays into the desired output table?
Thanks! Russ
Desired Output Table
Output I am getting
declare #json nvarchar(max) =
'{
"totalCount": 1,
"nextPageKey": null,
"result": [
{
"metricId": "builtin:host.cpu.usage",
"data": [
{
"dimensions": [
"HOST-CCCC3F95D7CE56"
],
"dimensionMap": {
"dt.entity.host": "HOST-CCCC3F95D7CE56"
},
"timestamps": [
1612634400000,
1612645200000,
1612656000000
],
"values": [
0.37900028935185187,
0.3709309895833333,
0.5088975694444444
]
}
]
}
]
}'
Select TableA.totalCount, TableResult.metricId,
TableDim.*
FROM OPENJSON(#json)
WITH(
totalCount int,
result NVARCHAR(MAX) as JSON
) as TableA
CROSS APPLY OPENJSON(TableA.result)
WITH(
metricId VARCHAR(100),
data NVARCHAR(MAX) as JSON
)TableResult
CROSS APPLY OPENJSON(TableResult.data)
WITH(
dimensions NVARCHAR(MAX) as JSON,
timestamps NVARCHAR(MAX) as JSON,
[values] NVARCHAR(MAX) as JSON
)TableDim

Answer 1

Hard to know what the correlation is between timestamps and values, but I've assumed it's by array index.
Is dimensions always a single value in the array? I have assumed so.
You then need to use OPENJSON (and no WITH block) to break out the two arrays, and join them together on index, which is supplied in key:
Select TableA.totalCount, TableResult.metricId,
TableDim.dimensions, Vals.*
FROM OPENJSON(#json)
WITH(
totalCount int,
result NVARCHAR(MAX) as JSON
) as TableA
CROSS APPLY OPENJSON(TableA.result)
WITH(
metricId VARCHAR(100),
data NVARCHAR(MAX) as JSON
)TableResult
CROSS APPLY OPENJSON(TableResult.data)
WITH(
dimensions NVARCHAR(MAX) '$.dimensions[0]',
timestamps NVARCHAR(MAX) as JSON,
[values] NVARCHAR(MAX) as JSON
)TableDim
CROSS APPLY (
SELECT tm.value AS Timestamp, v.value AS Value
FROM OPENJSON(TableDim.timestamps) tm
JOIN OPENJSON(TableDim.[values]) v ON v.[key] = tm.[key]
) Vals