Comma-delimited Distinct Values Of A Table Or Result-set

Question

So I have specification tables that relate to products that vary by product type. I need a stored procedure that will return a single-row of unique comma-delimited values in each of the columns (used for site navigation code) in a spec table (or a resultset of said spec table).

I hope this makes sense.

Thank you all for the responses so far. I will explain in more detail...

Each spec table has a different number of columns (and rows, for that matter). Let's say one of them has 50,000 rows and a manufacturer column. Now let's assume there are 5 unique manufacturers in the there as well. Let's also assume the same table also has a color column that shares 7 colors among all 50,000 rows.

My (currently imaginary) stored procedure should return one row with the following columns...

• Manufacturer:
  Manu1,Manu2,Manu3,Manu4,Manu5
• Color:
  color1,color2,color3,color4,color5,color6,color7

I intend to use this result to build my site navigation.

Answer 1

Assuming I've understood:

declare @productTypes table (Id int, Name nvarchar(32))
declare @products table (Id bigint not null identity(1,1), ProductType int, ProductName nvarchar(32))

insert @productTypes (Id, Name)
select 1, 'Food'
union
select 2, 'Drink'

insert @products (ProductType, ProductName)
select 1, 'Chips'
union
select 1, 'Fish'
union
select 2, 'Guinness'
union
select 2, 'Water'
union
select 2, 'Pan Galactic Gargle Blaster'

select pt.Name 
, STUFF
(
    (
        Select ',' + a.ProductName
        from @products a
        where a.ProductType = pt.Id
        FOR XML PATH('')),1,1,''
) ProductsOfType
from @productTypes pt

SQL Fiddle: http://sqlfiddle.com/#!6/e80ff/1

Results:

Name    ProductsOfType
Food    Chips,Fish
Drink   Guinness,Pan Galactic Gargle Blaster,Water