SQL, questions about join - sql

Question

I have two tables in sql 2012: name and prod with structure:
name: id int increment, name1 nvarchar(50)
prod: id int increment, products nvarchar(50), id_name int
Values for table are:
name table:
Id name1
1 pop
2 andi
prod table:
Id products id_name
1 coke 1
2 pizza 1
3 orange 2
I have done this query:
select name.name1, prod.product, prod.id_name
from name
join prod on name.id=prod.id_name
How can I obtain this result:
pop ->coke, pizza
andi->orange

Answer 1

unfortunately, there's no easy way to do it in SQL Server. Known solutions are:
xml trick (see below);
using variable to accumulate data (don't work for multiple group rows, only with cursor);
custom CLR aggregate;
here's xml:
select
n.name1,
stuff(
(
select ', ' + p.product
from prod as p
where p.id_name = n.id
for xml path(''), type).value('.', 'nvarchar(max)')
, 1, 2, '') as products
from name as n
sql fiddle demo
here's variable:
declare #product nvarchar(max), #id int
select #id = 1
select #product = isnull(#product + ', ', '') + product
from prod
where id_name = #id
select name1, #product as products
from name
where id = #id
sql fiddle demo

Answer 2

try this:
SELECT
G.id,
G.name1,
stuff(
(select cast(',' as varchar(10)) + U.product
from prod U
WHERE U.id_name = G.id
order by U.product
for xml path('')
), 1, 1, '') AS prod
FROM name G
ORDER BY G.name1 ASC

Answer 3

sqlfiddle
select
n.nameid [id],
n.name [name],
count(*)[count],
stuff(
(
select ', ' + p.prod
from prodtbl as p
where p.nameid = n.nameid
for xml path(''), type).value('.', 'nvarchar(max)'), 1, 1, '') as products
from nametbl n, prodtbl p
where p.nameid = n.nameid
group by n.nameid, n.name
order by [id];