This Leetcode problem Sales Analysis II LeetCode Solution is done in SQL.

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Sales Analysis II LeetCode Solution

Problem Statement

product_id is the primary key (column with unique values) of this table. Each row of this table indicates the name and the price of each product.

This table can have duplicate rows. product_id is a foreign key (reference column) to the Product table. Each row of this table contains some information about one sale.

Write an SQL query that reports the buyers who have bought S8 but not iPhone. Note that S8 and iPhone are products present in the Product table.

The result format is in the following example.

<strong>Output:</strong>Code language: HTML, XML (xml)

Explanation:
The buyer with id 1 bought an S8 but didn’t buy an iPhone. The buyer with id 3 bought both.

Sales Analysis II LeetCode Solution MySQL

select 
  distinct s.buyer_id 
from 
  Sales as s 
  join Product as p on s.product_id = p.product_id 
where 
  product_name = 'S8' 
  and s.buyer_id not in (
    select 
      buyer_id 
    from 
      Sales as s 
      join Product as p on s.product_id = p.product_id 
    where 
      product_name = 'iPhone'
  );Code language: SQL (Structured Query Language) (sql)

Sales Analysis II LeetCode Solution MySQL (Another approach)

select 
  buyer_id 
from 
  Sales 
  join Product using(product_id) 
group by 
  buyer_id 
having 
  sum(product_name = 'S8') > 0 
  and sum(product_name = 'iPhone') = 0;Code language: SQL (Structured Query Language) (sql)