#字典值相加 def union_dic(*objs): _keys = set(sum([obj.keys() for obj in objs],[])) _total = {} for _key in _keys: _total[_key] = sum([obj.get(_key,0) for obj in objs]) return _total…
这是执行前和执行后想要的效果 以下是用Sql语句实现的代码: select goodsno, goodsspec,SUM([count]) as count from goods group by goodsno ,goodsspec 下面这个则是用Linq实现的代码: var res = (from l in picModel group l by new { goodsno = l.GoodsNO, goodsSpec = l.SpecName, RecID = l.RecID, Posit…