How to get all products from one order to the list - sql

Question

I have written a query that returns data, here is my code
SELECT o.Id, p.ProductName, po.Quantity, p.Price, DeliveryMethod,
OrderDate, TotalSum, u.UserName FROM [Order] o
JOIN ProductsOrders po ON o.Id = po.OrderId
JOIN Product p ON po.ProductId = p.Id
JOIN Users u ON o.UserId = u.Id
ORDER BY o.Id
And it returns next:
OrderId ProductName Quantity Price DeliveryMethod OrderDate TotalSum UserName
98 Bed3 1 3000 Express 2018-08-04 7015 Ivan
98 Bed4 1 4000 Express 2018-08-04 7015 Ivan
100 Bed2 1 2000 2018-08-05 2000 Ivan
101 Bed2 1 2000 2018-08-05 5000 Ivan
101 Bed3 1 3000 2018-08-05 5000 Ivan
102 Bed0 1 0 Standard 2018-09-04 1005 Ivan
We can notice that for each product - one record
But I want to group all products by one order and get something like that:
- orderId
- deliveryMethod
- userName
- product1 quantity price
- ...
- productN quantity price
- totalAmount
101
Courier
John Doe
Black bag 1 1500
Fat Bike 1 5000
Thermos bottle 5 200
Total amount 7500
How can I modify the query?

Answer 1

The proper way to do this, IMO, would be to select 2 datasets. First dataset containing the parent Order data, and the second containing the individual ProductsOrders (product line items) for the Orders in the first dataset.
-- Select Orders
SELECT
[o].[Id] AS [OrderId]
,[o].[DeliveryMethod]
,[o].[OrderDate]
,[u].[UserName]
FROM [Order] [o]
INNER JOIN [Users] [u] ON [o].[UserId] = [u].[Id]
WHERE
[o].[Id] IN(SomeRangeOfOrderIds) -- (Or however you'd like to filter the results)
-- Select Products (product line items)
SELECT
[p].[ProductName]
,[po].[Quantity]
,[p].[Price]
FROM [ProductsOrders] [po]
INNER JOIN [Product] [p] ON [po].[ProductId] = [p].[Id]
WHERE
[po].[OrderId] IN(SameRangeOfOrderIdsAsTheQueryAbove)
...then take those results and display them however you'd like. Will this be appearing in a report? Or on a web page?

Answer 2

I have just implemented this issue in LINQ. Should have noticed that there is many-to-many relationship
var orders = db.Orders.Select(o => new
{
o.Id,
o.DeliveryMethod,
o.OrderDate,
o.UserId,
o.TotalSum,
Products = o.ProductsOrders.Select(p => new { p.Product.ProductName, p.Quantity, p.Product.Price}).ToList()
}).ToList();