<P>请问一下。</P> <P>&nbsp;</P> <P>原始数据： <BR>&nbsp; 日期&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 售价&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <BR>&nbsp; 2008-6-14 8：10：50&nbsp; &nbsp; &nbsp; 60 <BR>&nbsp; 2008-6-14 10：10：50&nbsp; &nbsp; 10 <BR>&nbsp; 2008-6-14 16：10：50&nbsp; &nbsp; 20 <BR>&nbsp; 2008-6-15 11：10：50&nbsp; &nbsp; 40 <BR>&nbsp; 2008-6-15 15：10：50&nbsp; &nbsp; 100 <BR>&nbsp; 2008-6-1621：10：50&nbsp; &nbsp; &nbsp; 200 <BR><BR>用linq语句查询后的数据变为： <BR>&nbsp; 日期&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 总额&nbsp; &nbsp; 数量&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <BR>&nbsp; 2008-6-14&nbsp; &nbsp; 90&nbsp; &nbsp; 3 <BR>&nbsp; 2008-6-15&nbsp; &nbsp; 140&nbsp; &nbsp; 2 <BR>&nbsp; 2008-6-16&nbsp; &nbsp; 200&nbsp; &nbsp; 1 </P> <P><BR>请问这样的LINQ语句怎么写，好像有点类似统计的。</P>