The NULL Trap! Solving LeetCode 584 in SQL and Python Pandas

In this video, we tackle LeetCode 584: Find Customer Referee. This problem seems simple at first, but it trips up many beginners because of how databases handle NULL values!

What we cover:
- How to handle NULL in SQL using IS NULL.
- Solving the same problem in Python using Pandas.
- Using .isna() and boolean masking to filter dataframes.

⏱️ Timestamps:
0:00 - Intro
0:45 - SQL Solution
1:24 - Python Pandas Solution

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Видео The NULL Trap! Solving LeetCode 584 in SQL and Python Pandas канала DataHead Girl