Database Indexing Explained
Database indexes use B-tree structures maintaining sorted pointers to rows. Like book indexes, they enable fast lookups without scanning entire tables.
June 2025
Database Transactions and ACID Properties
Transactions treat operations as single units—all succeed or all fail. ACID properties: Atomicity (all-or-nothing), Consistency, Isolation, Durability.
February 2023
What Is SQL and How Is It Used
What is SQL? A plain-English guide to how SQL works, what SELECT, JOIN, and GROUP BY do, why SQL remains dominant, and when to use SQL vs NoSQL databases.