Select from two tables and create object with data - mysql

Question

I'm trying to fetch data from two MySQL tables and push each into array.
I have to tables item and user with the same column - item_id. Now im requesting the data from them with
var query = "SELECT * FROM items, users WHERE items.item_id=?";
query = connection.format(query,req.params.item_id);
After this, im getting a wall of data. Like this:
{
{ user_id: 13213,
user_name: 'John',
item_id: 1337,
item_name: Leet stuff,
item_price: 13,37
},
{ user_id: 12345,
user_name: 'Mike',
item_id: 1337,
item_name: Leet stuff,
item_price: 13,37
}
But what I actualy need is this:
{
users: [
{ user_id: 13213,
user_name: 'John'
},
{ user_id: 12345,
user_name: 'Mike'
}
],
item_id: 1337,
item_name: Leet stuff,
item_price: 13,37
}

Answer 1

You can't do that in a single query. However, you can use two different queries and combine the output, e.g.:
SELECT u.user_id, u.user_name
FROM users u JOIN ITEMS i ON j.user_id = i.user_id
WHERE i.item_id = ?;
This will give you the list of users. You can then use the below query to get the item details:
SELECT item_id, item_name, item_price
FROM items
WHERE item_id = ?
You can then construct the required structure in your application.