Databases quizzes

How databases organize and compare information, and why missing values follow different rules.

1 quiz

Databases: Why NULL Is Not Equal to NULL

How databases store, find and protect data: the relational model, SQL's surprises, normalization, indexes, query plans, transactions and NoSQL trade-offs.
50 questions

The whole quiz comes before your apps

BrainTok asks a few questions like these before the apps you choose open, so your screen time turns into learning. For iPhone.