http://www.w3school.com.cn/sql/sql_groupby.asp
SELECT Customer,SUM(OrderPrice) FROM Orders GROUP BY Customer
本文来自博客园,作者:del88,转载请注明原文链接:https://www.cnblogs.com/del88/archive/2012/09/25/2701338.html
http://www.w3school.com.cn/sql/sql_groupby.asp
SELECT Customer,SUM(OrderPrice) FROM Orders GROUP BY Customer
本文来自博客园,作者:del88,转载请注明原文链接:https://www.cnblogs.com/del88/archive/2012/09/25/2701338.html