Update SQL table with random value from other table

Question

On Microsoft SQL Server 2008, I have a table with Products:

Id | Name | DefaultImageId

And one with Images:

Id | ProductId |

Answer 1

Check this out.

Update Products
Set DefaultImageId = (
SELECT top 1 Id 
From Images 
Where 1=1
and Products.Id = Images.ProductId
ORDER BY NEWID()
)