C# linq group by 异常 -----MySqlException: Unknown column 'GroupBy1.K1' in 'field list'

}).ToList(); 正确的答案（MySql）：
var result = (from si in model.table group si by si.NumCores into grp orderby grp.Key select new CoreCount { Cores = grp.FirstOrDefault().NumCores, Count = grp.Count() }).ToList();


以上在MySQL亲测有效，SQL server没有测试。。。

C# linq group by 异常 -----MySqlException: Unknown column 'GroupBy1.K1' in 'field list'

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