Solve LeetCode 607 in Minutes! | Sales Person SQL Solution (NOT IN Clause)
n this video, we tackle LeetCode 607. Sales Person, a classic "Easy" level SQL question that frequently appears in data analyst interviews. We need to find sales people who have never placed an order with the company "RED".
What you will learn:
How to join multiple tables (Orders and Company).
How to use Subqueries effectively.
Using the NOT IN clause to filter out specific records.
Thinking logically about exclusion problems in SQL.
The Logic:
First, we find all sales_ids associated with orders for the company 'RED'.
Then, we select the names of salespeople whose ID is NOT in that list.