How to select only the records with the highest date in LINQ

Question

I have a table, \'lasttraces\', with the following fields.

Id, AccountId, Version, DownloadNo, Date

The data looks like this:

Answer 1

If you just want the last date for each account, you'd use this:

var q = from n in table
        group n by n.AccountId into g
        select new {AccountId = g.Key, Date = g.Max(t=>t.Date)};

If you want the whole record:

var q = from n in table
        group n by n.AccountId into g
        select g.OrderByDescending(t=>t.Date).FirstOrDefault();