SQL Server 2014 STUFF with 2 Inner Join - sql

Question

My question really similar to this Use STUFF with INNER JOIN Query, but I've been trying what if the first column is a varchar type, currently this is my table. As for note I'm using SQL Server 2014
Table Customer
Cust_ID | Cust_Name
--------+---------
1 | Name1
2 | Name2
Table Order
Order_ID | Order_NO | Cust_ID
---------+----------+---------
1 | No.001 | 1
2 | No.002 | 2
Table Item
Item_ID | Order_ID | Item_Name | Quantity | Price
--------+----------+-----------+----------+-------
1 | 1 | A | 1 | 10
2 | 1 | B | 1 | 20
3 | 1 | C | 1 | 30
4 | 2 | D | 1 | 40
A few queries that I've tried:
SELECT
TBL_Sales_SO.SO_NO AS int, Tbl_Customer.Customer_Name,
ITEMS = STUFF ((SELECT DISTINCT ',' + TBL_SO_LIITEM.Item_Name
FROM Tbl_Customer
INNER JOIN TBL_Sales_SO ON Tbl_Customer.Com_Customer_ID = TBL_Sales_SO.Com_Customer_ID
INNER JOIN TBL_SO_LIITEM ON TBL_Sales_SO.Sales_SO_ID = TBL_SO_LIITEM.Sales_So_ID
WHERE TBL_Sales_SO.SO_NO = TBL_Sales_SO.Sales_SO_ID
FOR XML PATH('')), 1, 1,'')
FROM
TBL_Sales_SO, Tbl_Customer
ORDER BY
SO_NO
and the query that for me I think almost hit
SELECT
TBL_Sales_SO.SO_NO, Tbl_Customer.Customer_Name, TBL_SO_LIITEM.Item_Name,
TBL_SO_LIITEM.Quantity, TBL_SO_LIITEM.Price
FROM
((Tbl_Customer
INNER JOIN
TBL_Sales_SO on Tbl_Customer.Com_Customer_ID = TBL_Sales_SO.Com_Customer_ID)
INNER JOIN
TBL_SO_LIITEM on TBL_Sales_SO.Com_Customer_ID = TBL_SO_LIITEM.Sales_So_ID)
While tinkering the first code give me some various error, the second one im just not sure how make possible something like my target
Order_No | Name | Item_Name | Quantity | Price
no.001 | Name1 | A,B,C | 3 | 60
no.002 | Name2 | D | 1 | 40
UPDATE
Following Gordon Answer, i tinkering the code again, manage to the following table
Order_No| Name | Item_Name
no.001 | Name1 | A,B,C
no.001 | Name2 | D
no.002 | Name2 | D
no.002 | Name1 | A,B,C
and the query I use:
SELECT
s.SO_NO AS int, c.Cust_Name,
ITEMS = STUFF((SELECT DISTINCT ','+ Item_Name
FROM TBL_SO_LIITEM item
INNER JOIN TBL_Sales_SO s ON s.Sales_SO_ID = item.Sales_So_ID
WHERE c.Cust_ID = s.Cust_ID
FOR XML PATH('')), 1, 1, '')
FROM
TBL_Sales_SO s, Tbl_Customer c
WHERE
c.Cust_Name IN ('Name1','Name2')
ORDER BY
SO_NO

Answer 1

You seem to want:
SELECT s.SO_NO AS int, c.Customer_Name,
STUFF( (SELECT DISTINCT ',' + oi.Item_Name
FROM TBL_SO_LIITEM oi
WHERE s.Sales_SO_ID = oi.Sales_So_ID
FOR XML PATH('')), 1, 1,''
) as items
FROM TBL_Sales_SO s JOIN
Tbl_Customer c
ON s.cust_id = c.cust_id
ORDER BY SO_NO;
Note that the tables are only included once, either in the subquery or in the outer query. The naming conventions for your data is quite inconsistent, so the above is my best guess.