Question

编写查询，该查询将返回包含以下列的表：用户ID，网站ID，用户名，总销售额，退款总额，收取的净额

我需要编写一个查询，该查询将返回一个表，此刻我正在尝试找出谢谢。

Answer 1

我同意其他人的看法，即仅仅将其移交给他人不会对您的学习有所帮助。您需要在这里学习很多概念。如果您无法解释该问题，则提交该答案进行家庭作业可能会很尴尬（分数为0）！

with cte_sales as
(
    select
    t.[User Id],
    t.[Site Id],
    sum(t.Amount) as [Total Sales]
    from Transactions t
    where t.[Transaction Type] = 'Sale'
    group by t.[User Id],
             t.[Site Id]
),
cte_refunds as
(
    select
    t.[User Id],
    t.[Site Id],
    sum(t.Amount) as [Total Refunds]
    from Transactions t
    where t.[Transaction Type] = 'Refund'
    group by t.[User Id],
             t.[Site Id]
)
select
u.[User Id],
u.[Site Id],
u.[Name] as [User Name],
coalesce(s.[Total Sales],0) as [Total Sales],
abs(coalesce(r.[Total Refunds],0)) as [Total Refunds],
(coalesce(s.[Total Sales],0) + coalesce(r.[Total Refunds],0)) as [Net Amount Collected]
from Users u
left join cte_sales s on s.[User Id] = u.[User Id]
                     and s.[Site Id] = u.[Site Id]
left join cte_refunds r on r.[User Id] = u.[User Id]
                       and r.[Site Id] = u.[Site Id]
order by u.[User Id],
         u.[Site Id];

Demo

| User Id | Site Id | User Name | Total Sales | Total Refunds | Net Amount Collected |
|---------|---------|-----------|-------------|---------------|----------------------|
|       1 |       1 |    Arthur |         120 |           120 |                    0 |
|       2 |       1 |     Aaron |          90 |            30 |                   60 |
|       2 |       2 |     Brett |          90 |             0 |                   90 |

您好，目前正在学习中，我需要一些帮助。我需要编写一个查询，该查询将返回带有选择列的表

1 个答案: