Question

问。列出最近12个月内交易中没有特色的产品名称。

交易表

i.  Deal_id 
ii. Product_id
iii.    Deal_start_date
iv. Deal_end_date

产品昏暗表

i.  Product_id
ii. Product_name
iii.    Manufacturer

我的回答是：

Select Product_name, Rank() over(partition by year(Deal_start_date) order by Deal_start_date desc) as Deal_date
 From Product Dim Table
 Right join Deals Table on Product Dim Table.Product_id=Deals Table.Product_id
 where Deal_date > 1
 Group by Product_name
 Order by Deal_date desc

Answer 1

试试这个：

Select p.Product_name
From Product p
Where not exists
    (Select * from Deals
     where Product_id = p.Product_id
         and Deal_start_date <= @today
         and Deal_end_date >= start)

Answer 2

检查以下内容。 / 选择 Product_id，Product_name，制造商从产品昏暗哪里 product_id不在（选择product_id 从交易哪里 deal_end_date之间 Deal_end_dare＆gt; DateAdd（mm，-12，GetDate（））

）

SQL：什么是适合的查询？

2 个答案: