Introduction Anatomy of a Database B-Trees (Balanced Trees) Choosing the Right Data Structrue Data Structures in Databases Database Document Model Hash Indexes Introduction LSM-Trees (Log-Structured Merge Trees) SSTables (Sorted String Tables) Mongodb Aggregation Framework Basic Mongodb Relational Databases Data Types Foreign Keys Importing & Exporting Data ↪ Indexes Joins Models in Django Normalization Primary Keys SQL Commands SQL Queries ↪ Transactions