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EF多字段求和(分组/不分组)

时间:2018-12-15 14:46:13      阅读:124      评论:0      收藏:0      [点我收藏+]

分组多字段求和

query.GroupBy(q => new { q.Year, q.Month })
    .Select(q => new
    {
        Year = q.Key.Year,
        Month = q.Key.Month,
        BuildAmount = q.Sum(i => i.BuildAmount),
        RecAmount = q.Sum(i => i.RecAmount),
        Amount = q.Sum(i => i.Amount),
        RealAmount = q.Sum(i => i.RealAmount)
    });

不分组多字段求和(这样得到的就是对应字段的总的求和,其实还是利用了分组,不过给分组依据传个空,如果利用linq的话就是传个常数)

where.GroupBy(x => new { }).Select(q => new
                {
                    sumWeight = q.Sum(x => x.Weight),
                    sumQuantity = q.Sum(x => x.Quantity),
                    sumIncome = q.Sum(x => x.Income)
                }).FirstOrDefault();

 

EF多字段求和(分组/不分组)

原文:https://www.cnblogs.com/4job/p/10123315.html

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