linq groupby
select a,b,count(*) as c from t
group by a,b
这语句用linq应该怎么写?
var data = from t in list group t by new { t.a, t.b } into g select new { g.Key.a, g.Key.b, m = g.Count() };
group by a,b
这语句用linq应该怎么写?
var data = from t in list group t by new { t.a, t.b } into g select new { g.Key.a, g.Key.b, m = g.Count() };