加入基于树的 Table

Question

我有一个事实 table“定价”是这样的：

Serial	Main_Category	Group_Category	Sub_Category	Item	Location	Price
1	Clothes	Men	T Shirts	T Shirt 1	Store 1	100
2	Clothes	Men	T Shirts	T Shirt 1	All	25
3	Devices	TVs	Smart TVs	SmartTV 1	Store 1	50
4	Devices	TVs	Smart TVs	All	Store 1	75

您可以注意到，并非所有项目都明确定义，如果未提及该项目，它应该在“All”中可用。

"All" 可以在除 Price

之外的任何列中找到

另一个维度table“销售额”像这样：

Serial	Main_Category	Group_Category	Sub_Category	Item	Location
1	Clothes	Men	T Shirts	T Shirt 1	Store 1
2	Clothes	Men	T Shirts	T Shirt 1	Store 3
3	Devices	TVs	Smart TVs	SmartTV 3	Store 1
4	Devices	TVs	Smart TVs	SmartTV 1	Store 1

我想将 Pricing table 的价格添加到 Sales table 而不使用每个组合的连接

异常输出：

Serial	Main_Category	Group_Category	Sub_Category	Item	Location	Price
1	Clothes	Men	T Shirts	T Shirt 1	Store 1	100
2	Clothes	Men	T Shirts	T Shirt 1	Store 3	25
3	Devices	TVs	Smart TVs	SmartTV 3	Store 1	75
4	Devices	TVs	Smart TVs	SmartTV 1	Store 1	50

更新： 可以在不止一列中找到“全部”

Answer 1

你可以做到

select *
from (
    select s.*, p.Price, row_number() over(partition by s.Main_Category, .., s.Location order by p.Serial) rn
    from Sales s
    join Pricing p on 
      (s.Main_Category = p.Main_Category or p.Main_Category ='All')
      and ..
      and (s.Location = p.Location or p.Location ='All')
 ) t
 where rn = 1;