Glossary

15 database terms, each answered in under two minutes. Entries are organized by concept:

• Storage — storage engines, pages, write-ahead logging, LSM trees, buffer pools, checkpoints
• Access — indexes, primary keys, query plans, joins
• Correctness — transactions, ACID, MVCC, isolation levels, vacuum

Every term links back to the lesson where it is introduced. Start with any entry or work through the lessons in order.