Question

We are trying to limit voting by one IP address per day for some rock videos. I have started with this query from another question on stack overflow. However it is only return one vote per day when I need one vote per IP address per day. How would I do this please?

;with cte as
(
  select
    *,
    row_number() over(partition by datediff(d, 0, created) order by created desc) as rn 
  from rock_vote
)
select cte.VideoId, cte.IPAddress, o.BandName, cte.Created
from cte  
inner join rock_video o on cte.videoId = o.videoid
where rn = 1
order by created desc

Answer 1

;with cte as
(
  select
    *,
    row_number() over(partition by IPAddress, datediff(d, 0, created) 
    -------------------------------^^^^^^^^^^^
    order by created desc) as rn 
  from rock_vote
)
select cte.VideoId, cte.IPAddress, o.BandName, cte.Created
from cte  
inner join rock_video AS o on cte.videoId = o.videoid
where cte.rn = 1
order by o.created desc;