How Database Indexes Improve Query Performance
Database indexes use B-tree structures maintaining sorted pointers to rows. Like book indexes, they enable fast lookups without scanning entire...
June 2025
Understanding Database Transactions and ACID Rules
Transactions treat operations as single units—all succeed or all fail. ACID properties: Atomicity (all-or-nothing), Consistency, Isolation,...
February 2023
SQL: Understanding Its Role and Functionality
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...