Multiple JOINs

Concepts: sqlMultipleJoins

Each join type has specific data preservation characteristics. Understanding these helps you select the right tool for your analysis. Choosing the Right Join Each join type preserves different rows. Choose based on which data you can't afford to lose: Relational Context For an in-depth exploration of table relationships and cardinality notation, see the Relationships lesson in Data Modeling. The type of relationship between tables often guides your join choice: Why Multiple Joins Consider an e-commerce database with three tables: customers, orders, and products. The orders table acts as a "bridge" - it contains customer IDs linking to customers, and product IDs linking to products. To get a complete picture of "who ordered what," you need to join all three tables. Follow how the orders tab