我写了以下代码，确发现第一个自定义方法可以执行，第二个不行，会报【LINQ to Entities 不识别方法“System.Linq.IQueryable`1[WinTestApp.Struct.ACCOUNT_TBL] CreateQuery()”，因此该方法无法转换为存储表达式】错误不知道是何原因，请高手指点！

第一个方法：        protected IQueryable<ACCOUNT_TBL> orgAccount(DateTime start, DateTime end)
        {
            return _analysisEntity.ACCOUNT_TBL.Where(c => c.NEWTIME >= start && c.NEWTIME < end && c.DEL_FLAG == false);
        }

第二个方法：

       public IQueryable<ACCOUNT_TBL> CreateQuery()
        {
           return _analysisEntity.ACCOUNT_TBL.Where(c => c.DEL_FLAG == false);
        }

定义上面两个方法后，写如下语句进行调用会报刚才所说的错，如果把第二个方法内容拿出来，不写在方法内，就可以执行。

var q = from at in orgAccount(start, end)
                    group at by new { at.NEWTIME.Year, at.NEWTIME.Month, at.NEWTIME.Day }
                        into at2
                        select new CountMoney
                        {
                            Year = at2.Key.Year,
                            Month = at2.Key.Month,
                            Day = at2.Key.Day,
                            Count = at2.Sum(c => c.INSUTANCE)==0?0:at2.Sum(c => c.INSUTANCE)/CreateQuery().Sum(c => c.CASH + c.INSUTANCE + c.CHEQUE + c.OTHER + c.POS)}；

protected IQueryable<ACCOUNT_TBL> orgAccount(DateTime start, DateTime end)
        {
            return _analysisEntity.ACCOUNT_TBL.Where(c => c.NEWTIME >= start && c.NEWTIME < end && c.DEL_FLAG == false);
        }