PIVOT TABLE - 获得本月的总计

Question

我有TomT编写的代码，这里是SQLFiddle： - 非常感谢TomT。

SQL Fiddle

如何添加一个获得本月Grand TotalLoad的新列。

以下是我从上面的小提琴中看到的内容：

列标题：

月| GrandTotalforthe月|在峰值TotalLoad | Off Peak TotalLoad | onPeak MaxLoad | OffPeak MaxLoad |

行标题基于月份： Jan：202.0869 + 166.6052 = 368.6921（GrandTotalforthemonth）| Onpeak TotalLoad for the Month = 202.0869 |本月OffPeak TotalLoad = 166.6052 |月份的OnPeak Maxload = 0.9987，月份的OffPeakLoad = 0.9956

Answer 1

您最后的选择需要使用conditional aggregation

select [month], sum([load]) as GrandTotal,
       sum( case when [onpeak] =0 then [load] end) as OnPeakTotalLoad,
       sum( case when [onpeak] =1 then [load] end) as OffPeakTotalLoad,
       max( case when [onpeak] =0 then [load] end) as OnPeakMaxLoad,
       max( case when [onpeak] =1 then [load] end) as OffPeakMaxLoad
from ReadingMonthPeak
group by [month]
order by [month]