LeetCode 175 | Combine Two Tables | SQL LEFT JOIN Explained | CodeEra-Tech

In this video, we solve LeetCode SQL Problem 175 – Combine Two Tables and explain it step by step using a LEFT JOIN in a very simple and beginner-friendly way.

This is one of the most important SQL interview questions, frequently asked in technical interviews and coding tests.

🔍 What you will learn in this video:

✅ How to use LEFT JOIN in SQL
✅ How to combine data from two tables
✅ How to handle NULL values properly
✅ Real interview-level SQL logic
✅ Clear explanation with examples

🧠 Problem Summary:

You are given two tables:

Person (personId, firstName, lastName)

Address (personId, city, state)

Your task is to display:
👉 first name, last name, city, and state of all persons, even if they do not have an address.

🎯 Who should watch this video?

• SQL Beginners
• Students preparing for placements
• Interview candidates
• Anyone learning SQL joins

🔗 Connect with me:

📌 LeetCode Profile: https://leetcode.com/u/CodeEra-Tech/
📌 GitHub (Python & SQL Solutions): https://github.com/CodeEra-Tech

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