PIVOT TABLE-得出該月的總計

Question

我有TomT編寫的代碼，這里是SQLFiddle：-非常感謝TomT。

SQL小提琴

如何添加新列以獲取當月的Grand TotalLoad。

這是我從上面的小提琴看的內容：

列標題：

月| 月份總計 高峰時TotalLoad | 非高峰期總負荷| onPeak MaxLoad | OffPeak MaxLoad |

行標題基於月份：1月：202.0869 + 166.6052 = 368.6921（月總計）| 本月的Onpeak總負載= 202.0869 | 該月的OffPeak總負載= 166.6052 | 該月的OnPeak最大負載= 0.9987，該月的OffPeakLoad = 0.9956

Answer 1

您的最后選擇需要使用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]