Recall
Set 1: Quick Check
Choose stable join keys, LEFT JOIN behavior, and one-to-many row counts.
Joining Related Tables
Connect tables with stable keys while preserving grain and unmatched rows deliberately.
Start Chapter PracticeChapter plan
What you will be able to do
- Use INNER JOIN and LEFT JOIN without accidental row multiplication.
- Study time
- 30–36 minutes, self-paced
- Course
- SQL for Data Analysis (Beginner)
- Practice order
- Four sets, completed in sequence
Chapter practice
Practice in chapter order
10 activities · 80% mastery target
Start set 1
Guided application
Set 2: Core Practice
Qualify ambiguous fields, count unmatched rows, and order a safe join workflow.
Hands-on
Set 3: Workplace Task
Add customer names to orders and preserve customers with no orders.
Independent check
Set 4: Mastery Check
Diagnose row multiplication and independently build an item-product report.