小编Mah*_*ani的帖子

我想通过使用EF在Row_number上分区加载数据.

    SELECT *
    FROM (
       SELECT sf.SerialFlowsId
                     ,sf.GoodsSerialId
                     ,d.FormTypeId
                     , d.GoodsId
                     ,ROW_NUMBER() OVER (PARTITION BY d.GoodsId, sf.GoodsSerialId ORDER BY sf.Date DESC)row
       FROM sam.SerialFlows sf
       INNER JOIN sam.Detail d ON d.DetailId = sf.DetailId
       )z
WHERE z.row =1 
       AND z.FormTypeId=7
       AND z.GoodsId=51532

这个问题是我的期待.

我尝试使用这个表达式,但遗憾的是Zip扩展方法无法在ef中识别

var goodsSerials = context.SerialFlows.OrderByDescending(x => x.Date).GroupBy(x => new { x.Detail.GoodsID, x.Date })
                    .Select(g => new {g})
                    .SelectMany(z => z.g.Select(c => c)).Zip(m, (j, i) => new { GoodSerial=j,j.Detail.FormTypeID,j.Detail.GoodsID,rn=i })
                    .Where(x => x.rn== 1 && x.GoodsID== goodsId && x.FormTypeID==7).Select(x => …