Linq distinct & max

Question

I have to query this table:

symbol    time
------    ----------
aaa       2013-04-18 09:10:28.000    
bbb       2013-04-18 09:10:27.000    
aaa       2013-04-18 09:10:27.000    
bbb       2013-04-18 09:10:26.000

I need one row for all distinct symbols having the biggest time value. How do I have to write my linq query?

Thanks in advance,

Answer 1

Group rows by symbol and then select from each group item with max time (Table is your database table name from context):

from r in Table
group r by r.symbol into g
select g.OrderByDescending(x => x.time).First()

Same with method syntax:

Table.GroupBy(r => r.symbol)
     .Select(g => g.OrderByDescending(x => x.time).First());

Answer 2

try out this

var q = MyTable.GroupBy(x => x.symbol )
               .Select(g => g.OrderByDescending(i => i.time).First());

or use max like this

 var data = from r in MyTable
                   group r by r.symbol into g
                   select new { name= g.Key, data= g.Max(a=>a.time) };