Key question
How do I store related data and query it correctly?
Check your understanding
Find an example, an application and a limit. Explain the concept without using its name, then compare your explanation with a primary source.
Loading your learning…
Claims to examine
A useful database model preserves intended relationships, and a correct query must account for absent as well as matching rows.
Follow a learning route
How do I store related data and query it correctly?
Build a SQLite reading log with keys, joins, constraints and rollback checks.