EF架构~有时使用SQL更方便

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在进行统计时，尤其是按月进行统计，由于我们采用的时间是一个2015-12-12日这种，所以在linq你无法进行拆分，你拆分了在发到ＳＱＬ时也会报错，因为ＳＱＬ那边更新不需要你.net的方法，人家ＳＱＬ只认自己的方法，哈哈，这也是正常的，为了解决这个问题，我们有时也需要使用纯ＳＱＬ，当前也是基于ＥＦ的，通过ＥＦ的上下文把ＳＱＬ语句发到数据库。

下面是一个比较复杂的统计，按月把某个用户的某个任务进行求和及求总数的统计，看一下代码

　　　　　　　var idArr = user_FighterRepository.GetModel(i => i.ParentID == companyId).Select(i => i.UserID).ToList();
            string para= string.Join(",", idArr);
            var linq = Db.Database.SqlQuery<FighterTaskTotalDTO>(
             @"SELECT  CONVERT(CHAR(7), Day, 120) as TotalDate,
                                    COUNT(*)  as TaskCount,
                                    FighterID ,
                                    SUM(FinishedNumber) as FinishedCount
                            FROM    dbo.Count_Fighter_ByDay
                            GROUP BY FighterID ,
                                    CONVERT(CHAR(7), Day, 120)
                            HAVING  FighterID IN ("+para+")");
            return linq.ToList();

看你下ＳＱＬ的结果

aaarticlea/png;base64,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" alt="" />

再看一下网页上显示的结果

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" 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最后需要注意一点，就是你的ＳＱＬ语句的每个字段必须要有别名，如你的count(*)统计，需要为它起的别名，并且你的别名要和EF映射的实体属性对应！

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