Question

我想计算当FuelIndicator从NotReserve切换到Reserve时累计的运行总计。任何人都可以建议我将如何实现这一目标吗？

FuelDate    FilledBy    KMSreading  FuelAmt FuelPrice   Vehicle         FuelIndicator
2017-04-12  Acb         34040       200     71.29       Suzuki GS150R   Reserve
2017-04-17  Acb         34142       200     71.29       Suzuki GS150R   Reserve
2017-04-20  Acb         34246_______200_____72.97_______Suzuki GS150R   Not Reserve
2017-04-24  Acb         34350_______200_____72.97_______Suzuki GS150R   Not Reserve
2017-04-28  Acb         34365_______100_____72.97_______Suzuki GS150R   Reserve
2017-04-30  Acb         34500       100     72.97       Suzuki GS150R   Reserve
2017-05-03  Acb         34620       250     75.20       Suzuki GS150R   Reserve

预期产出：

FuelDate    FilledBy    KMSreading  FuelAmt FuelPrice   Vehicle         FuelIndicator
2017-04-12  Acb         34040       200     71.29       Suzuki GS150R   Reserve
2017-04-17  Acb         34142       200     71.29       Suzuki GS150R   Reserve
2017-04-28  Acb         34365_______500_____72.97_______Suzuki GS150R   Reserve
2017-04-30  Acb         34500       100     72.97       Suzuki GS150R   Reserve
2017-05-03  Acb         34620       250     75.20       Suzuki GS150R   Reserve

谢谢，

Answer 1

你似乎想要结合＆＃34;不要保留＆＃34;以下＆＃34;保留＆＃34; s。这似乎假设所有其他列是相同的，除了燃料amt，kms读数和日期。

您需要定义一个组。在这种情况下，困难的部分是获得额外的＆＃34;储备＆＃34;与之前的＆＃34;不保留＆＃34; s。关键的想法是总结＆＃34;储备＆＃34;从每行到数据末尾的值。此方法将根据您的需要分配组：

select t.*,
       sum(case when fuelindicator = 'Reserve' then 1 else 0 end) over (partition by vehicle order by fueldate desc) as grp
from t;

一旦我们进行了分组，剩下的就是聚合：

select max(fueldate) as fueldate, FilledBy, max(KMSreading) as KMSreading,
       sum(FuelAmt) as fuelamt, FuelPrice, Vehicle,
       'Reserve' as fuelindicator
from (select t.*,
             sum(case when fuelindicator = 'Reserve' then 1 else 0 end) over (partition by vehicle order by fueldate desc) as grp
      from t
     ) t
group by FilledBy, FuelPrice, Vehicle ;

基于指标列SQL Server运行总计

1 个答案: