在 BigQuery 中计算订单顺序

Question

我是 BigQuery SQL 的新手，正在努力根据 table 客户订单计算“订单序列”。

在我的示例中，我正在处理客户采购，其中我有销售渠道、唯一订单号、订单日期和其他采购以及客户信息。我还在我的查询中加入了两个 table，以便将所有必要的数据整合到一个 table。

这是我当前查询的样子：

SELECT
t1.channel as sales_channel,
t1.number as order_number,
t1.date as order_date,
t1.email as customer,
t1.price as gross_price,
t1.sku as SKU,
t1.quantity as sku_quantity,
t1.sku_price as sku_price,
t2.order_status,
t2.weight,
t2.size
FROM order_itemsinfo t1
JOIN order_statusinfo t2
ON t1.number= t2.number
where t1.price > 0 AND 
t1.sku in ("ABC-233-20L","DEF-100-10Y")

但是，基于这个查询，我还想添加另一列“订单顺序”，它是在客户级别上计算的，并基于购买日期。

因此，计算出的订单序列的结果应如下所示：

sales_channel | order_number | order_date | customer              | ...  | order_sequence
US            | US184746     | 2020-01-04 | customer1@sample.com  | ...  | 1
US            | US752646     | 2020-02-14 | customer1@sample.com  | ...  | 2
US            | US975246     | 2020-02-28 | customer1@sample.com  | ...  | 3
US            | US997512     | 2020-05-07 | customer1@sample.com  | ...  | 4
FR            | FR210000     | 2020-03-22 | customer2@sample.com  | ...  | 1
FR            | FR354884     | 2020-04-10 | customer2@sample.com  | ...  | 2
FR            | FR578410     | 2020-04-30 | customer2@sample.com  | ...  | 3
UK            | UK454100     | 2020-04-01 | customer3@sample.com  | ...  | 1
UK            | UK884212     | 2020-08-21 | customer3@sample.com  | ...  | 2
IT            | IT898990     | 2020-08-04 | customer4@sample.com  | ...  | 1
IT            | IT999181     | 2020-10-24 | customer4@sample.com  | ...  | 2
IT            | IT999652     | 2020-11-06 | customer4@sample.com  | ...  | 3

如何在不干扰 JOIN 和我的过滤器的情况下将其最好地集成到我上面的查询中？

谢谢！

Answer 1

如果我没理解错的话，你会使用window函数：

SELECT . . .,
       ROW_NUMBER() OVER (PARTITION BY ii.customer ORDER BY ii.date) as seqnum
FROM order_itemsinfo ii JOIN
     order_statusinfo si
     ON ii.number = si.number
WHERE ii.price > 0 AND 
      ii.sku in ('ABC-233-20L', 'DEF-100-10Y');

请注意，我更改了 table 别名。这些不是使用无意义的字母，而是 table 名称的缩写。这使得查询更容易理解。

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