如何创建SQL查询以按特定月份的用户ID求和

Question

我有下表

idOrder | idCust |Name | OrderDate     | affId | Sku | desc |quantity |unitPrice | subtotal
224332  | 4657   |Jeff |6/5/2014 11:09 | 1     |1344 |---  | 6       |41.25     | 247.5
224332  | 4657   |Jeff |6/5/2014 11:09 | 1     |1388 |---  | 3       |41.25     | 123.75
224388  | 4656   |Jane |6/5/2014 08:09 | 1     |1388 | --- | 6       |41.25     | 247.5
224332  | 4659   |Tom  |7/5/2014 11:09 | 1     |1222 |---  | 6       |41.25     | 247.5
224332  | 4657   |Jeff |7/7/2014 11:09 | 1     |1344 |---  | 3       |41.25     | 123.75
224388  | 4656   |Jane |7/5/2014 08:09 | 1     |1222 |---  | 6       |41.25     | 247.5

我需要总结一下表格 所有6月购买的总购买量为当月的sku＃1344 所以我会在6月份的新表中有以下内容

IdCust | Name| Total Purchase (dollar amount) |  Total  of sku# 1334 (dolar amount)|
4657   |Jeff | sum of all the above for june  | some of just that sku for june|
4656   |Jane | sum of all the above for june  | some of just that sku for june|
4659   |Tom  | sum of all the above for june  | some of just that sku for june|

Answer 1

您可以使用条件聚合轻松完成此操作：

select idCust, Name, sum(quantity * unitPrice) as TotalPurchase,
       sum(case when sku = 1344 then quantity * unitPrice end) as TotalPurchase_1344
from table t
where date >= '2014-06-01' and date < '2014-07-01'
group by idCust, Name;