TSQL Select basic hierarchical data from JSON - json

Question

This is a rediculously simple question, but I cannot find a single working example anywhere. MSDN hints it is possible (here and here), but misses the actual example, and Google presents a myriad of examples outputting JSON from TSQL, whereas I need the reverse.
Taking a most basic JSON structure:
DECLARE #json nvarchar(max) = N'[{
"Id": 1,
"name": "John",
"skills": [
{"title": "Azure" },
{"title": "VB" },
{"title": "JavaScript" }]
}, {
"Id": 2,
"name": "Jane",
"skills": [
{"title": "Azure" },
{"title": "SQL" },
{"title": "C#" }]
}]';
I figured how to get the highest-level values, such as Id and name:
SELECT
*
FROM
OPENJSON(#json) WITH (
ID int '$.Id',
name nvarchar(50) '$.name'
);
What I'd like is to output PersonId, and the respective skill titles for each, e.g.
PersonId SkillTitle
-----------------------
1 Azure
1 VB
1 JavaScript
2 Azure
2 SQL
2 C#
Google only provides me with the reverse logic. My badly-broken attempt based on what I can find is here:
SELECT
*
FROM
OPENJSON(#json, '$.skills') WITH (
PersonId int './Id',
SkillTitle nvarchar(50) '$.title'
);

Answer 1

The below code snippet would give you the required results -
SELECT
JSON_Value (c.value, '$.Id') as ID,
JSON_Value (p.value, '$.title') as SkillTitle
FROM OPENJSON (#json) as c
CROSS APPLY OPENJSON(c.value,'$.skills') as p
Have implemented the same by CROSS APPLYing the JSON child node with the parent node and using the JSON_Value() function.