public void QueryTest2()
{
var db = DatabaseHelper.GetHelper("test");
var repos = new RepositoryDatabase <UserProfile>(db);
var obj1 = repos.Get(1);
var obj2 = repos.Get(x => x.Email == "*****@*****.**" && x.Sex == 1);
var list1 = repos.GroupbyCount <int>(x => x.Sex, x => x.Id > 1 && x.Id < 1000);
var list2 = repos.GroupbyMax <int, int>(x => x.Sex, x => x.Id, x => x.Id > 1 && x.Id < 1000);
var list3 = repos.GroupbySum <int, int>(x => x.Sex, x => x.Id, x => x.Id > 1 && x.Id < 1000);
var sumValue = repos.Sum <int>(x => x.Id, x => x.Id > 1 && x.Id < 1000 && x.Sex == 1);
var maxValue = repos.Max <int>(x => x.Id, x => x.Id > 1 && x.Id < 1000 && x.Sex == 1);
}