SQL Select Distinct column and latest date

Question

I\'m looking to select just the latest records of a table based on date, but only one one Distinct listing of each of the urls. The table structure is like this;

Answer 1

This is actually pretty easy to do using simple aggregation, like so:

select URL, max(DateVisited)
from <table>
group by URL

Answer 2

This is usually done using row_number():

select t.*
from (select t.*,
             row_number() over (partition by url order by datevisited desc) as seqnum
      from t
     ) t
where seqnum = 1;

This allows you to get all the columns associated with the latest record.