SQL Subqueries & Nested IF Explained | SELECT, WHERE, FROM + CASE Logic | MySQL Data Analysis

Publicado el: 25 junio 2025
en el canal de: DrShem 360 Hub

Welcome to Day 7 of the StatQuestJourney Hub 10-Day SQL for Data Analysis Challenge!
In this session, we dive into subqueries and nested IF logic using CASE statements — essential tools for writing powerful, layered SQL queries.

🔍 What You’ll Learn:

Subqueries inside SELECT: Add computed values in result columns

Subqueries inside WHERE: Filter data using values from other queries

Subqueries inside FROM: Create temporary tables for JOINs

Nested IF (CASE): Classify data into tiers or categories dynamically

📊 Real-world scenario:
Using an ecommerce_demo database with customers, orders, and payments, we uncover:

High-spending customers

Most used payment methods

Conditional customer segmentation

🧰 Tools: MySQL Workbench
📁 Dataset: ecommerce_demo
⏱️ Duration: 10–15 minutes
🎯 Skill Level: Beginner to Intermediate

Whether you're preparing for SQL interviews, dashboards, or backend queries — mastering subqueries + CASE logic makes you a true SQL analyst.

#SQLSubqueries #MySQLWorkbench #DataAnalysis #NestedIF #CASEStatement #StatQuestJourney #SQLTutorial #DataAnalytics

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