How to request JSON among three tables - sql

Question

Suppose I have 3 tables employee, child and employee_child.
The first table contains id and name columns, the second contains id and name as well, and in the last contains id, employee_id, child_id.
Those tables (employee and child) are associated in the table employee_child.
To help, I let these queries to populate those tables:
CREATE TABLE employee (
id INTEGER PRIMARY KEY,
name VARCHAR(128))
INSERT INTO employee(id, name)
VALUES(1, 'Josh'), (2, 'Michel'), (3, 'Will')
CREATE TABLE child (
id INTEGER PRIMARY KEY,
name VARCHAR(128))
INSERT INTO child(id, name)
VALUES(1, 'Karen'), (2, 'Adam'), (3, 'Ellen')
CREATE TABLE employee_child (
id INTEGER PRIMARY KEY,
employee_id INTEGER NOT NULL,
child_id INTEGER NOT NULL)
ALTER TABLE employee_child ADD FOREIGN KEY (employee_id) REFERENCES employee (id)
ALTER TABLE employee_child ADD FOREIGN KEY (child_id) REFERENCES child (id)
INSERT INTO employee_child(id, employee_id, child_id)
VALUES(1, 1, 1), (2, 1, 2), (3, 2, 3)
Results of selects from tables
I need to get the employee's name and his child's names by employee.id using JSON request, and get the following answer:
{
"id":1,
"name":"Josh",
"children":[
{
"id":1,
"name":"Karen"
},
{
"id":2,
"name":"Adam"
}
]
}
I've tried another way, but the most right answer that I got was this following query:
SELECT [''] = (SELECT e.id, e.name
FROM employee e
WHERE e.id = 1
FOR JSON PATH),
[children] = (SELECT c.id, c.name
FROM child c
INNER JOIN employee_child ec ON ec.child_id= c.id
WHERE ec.employee_id = 1
FOR JSON PATH)
FOR JSON PATH
I'd like to get a support to achieve the fully answer.

Answer 1

FOR JSON AUTO seems to get you exactly what you want:
SELECT e.id,
e.name,
children.id,
children.name
FROM dbo.employee e
JOIN dbo.employee_child ec ON e.id = ec.employee_id
JOIN dbo.child children ON ec.child_id = children.id
WHERE e.id = 1
FOR JSON AUTO;