数据准备例如以下: SalesData: LOAD Num(ID) as ID, Date(Date) as Date, Month, Num(Year) as Year, Num(Sales) as Sales Inline [ ID, Date, Month, Year, Sales 1, 2012-1-1, 1, 2012, 20 2, 2012-1-1, 2, 2012, 21 3, 2012-1-1, 3, 2012, 23 4, 2013-1-1, 1, 2013, 34 5, 20