PIVOT TABLE-得出该月的总计

Question

我有TomT编写的代码，这里是SQLFiddle：-非常感谢TomT。

SQL小提琴

如何添加新列以获取当月的Grand TotalLoad。

这是我从上面的小提琴看的内容：

列标题：

月| 月份总计 高峰时TotalLoad | 非高峰期总负荷| onPeak MaxLoad | OffPeak MaxLoad |

行标题基于月份：1月：202.0869 + 166.6052 = 368.6921（月总计）| 本月的Onpeak总负载= 202.0869 | 该月的OffPeak总负载= 166.6052 | 该月的OnPeak最大负载= 0.9987，该月的OffPeakLoad = 0.9956

Answer 1

您的最后选择需要使用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]