SQL，需要改造的表

Question

我與Microsoft SQL Server 2014的工作我 有下一個數據格式的表格：

|customerId | action | amount | isSuccessful | paymentCount | 
|____1____ |__ W__ |____10__|____0____  |_____2________| 
|____1____ |__ D__ |____20__|____1____  |_____3________| 
|____1____ |__ W__ |____30__|____1____  |_____1________| 
|____1____ |__ D__ |____40__|____0____  |_____1________| 

我需要的是做這種格式報告：

|customerId|depositAmount|withdrawalAmount|depositAttemptCount|withdrawalAttemptCount| 
|____1____ |______20 ____|________30_____ |________4_______ _|________3__________ | 

如何使用select「轉換」表？

我將不勝感激任何幫助。

Answer 1

可以使用條件聚集在這裏：

select customerId, 
    sum(case when action = 'D' and isSuccessful = 1 then amount else 0 end) as depositAmount, 
    sum(case when action = 'W' and isSuccessful = 1 then amount else 0 end) as withdrawalAmount, 
    sum(case when action = 'D' then paymentCount else 0 end) as depositAttemptCount, 
    sum(case when action = 'W' then paymentCount else 0 end) as withdrawalAttemptCount 
from your_table 
group by customerId;