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

declare @carg_id as int
DECLARE cursor_cargo CURSOR FOR 
    SELECT carg_id FROM cargo

OPEN cursor_cargo

FETCH NEXT FROM cursor_cargo
INTO @carg_id
WHILE  @@FETCH_STATUS =0
BEGIN

    update cargo set ciud_id = (
    select top 1 ciud_id from ciudad 
    inner join Pais on Pais.pais_id = ciudad.pais_id
    where ciudad.pais_id is not null and empr_id is  null and pais_status =1 order by  NEWID()) WHERE CARG_ID = @CARG_ID

    FETCH NEXT FROM cursor_cargo
        INTO @carg_id
END
CLOSE cursor_cargo
DEALLOCATE cursor_cargo