Question

I have a table with following columns

1. ID
2. UserID
3. ImageUrl

I want retrieve a random ImageUrl for each UserID. For example, there 4 rows in the table

 1 12251 Winter.jpg
 2 12251 Summer.jpg 
 3 33333 Fall.jpg
 4 33333 Spring.jpg

and the query retrieve the following rows

 1 12251 Winter.jpg
 4 33333 Spring.jpg

Answer 1

select userid,picture from
(
select userid, picture, ROW_NUMBER() over (partition by userid order by newid()) rn 
from yourtable
) v
where rn =1
order by xtype