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