SQL 查询 - 计算 SUM 大于当前记录的记录数

Question

我正在编写一个 SQL 查询来对产品的总销售额求和，我需要一种方法来使用 COUNT 函数来计算 SUM（总销售额）大于当前记录的记录数.

这是我目前的情况：

SELECT product_id, SUM(product_gross_revenue) AS TotalSales, t.name as Category

FROM {prefix}wc_order_product_lookup c

LEFT JOIN wp_posts p ON p.id = c.product_ID

LEFT JOIN wp_term_relationships AS tr ON tr.object_id = p.ID

JOIN wp_term_taxonomy AS tt ON tt.taxonomy = 'product_cat' AND tt.term_taxonomy_id = tr.term_taxonomy_id

JOIN wp_terms AS t ON t.term_id = tt.term_id

WHERE (t.name='Cat A' OR t.name='Cat B' OR t.name='Cat C' OR t.name='Cat D' OR t.name='Cat E') 

GROUP BY product_id
ORDER BY TotalSales DESC

我想在我的 select 语句中添加一个 COUNT 函数来计算 TotalSales 大于当前记录的记录数，但我尝试的所有操作都失败了。

例如，我当前的 table 看起来像这样：

product_id	product_gross_revenue	name
1	50	Cat A
2	150	Cat B
3	100	Cat C
1	150	Cat A
3	200	Cat C

我希望我想要的输出是：

product_id	TotalSales	name	Count
1	200	Cat A	2
2	150	Cat B	3
3	300	Cat C	1

Answer 1

with data as (<your query minus order by>)
select *,
    (
      select count(*)
      from data d2
      where d2.TotalSales > d1.TotalSales 
    ) as X
from data d1
order by TotalSales desc

如果您的条件变得更复杂，那么子查询将起作用。听起来这也行得通：

rank() over (order by sum(product_gross_revenue)) - 1 as TotalSales

SQL 查询 - 计算 SUM 大于当前记录的记录数

SQL Query - Count number of records where SUM is greater than current record

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