Database tutorial - IT technology blog

pg_cron: Schedule PostgreSQL Tasks Inside the Database Without OS Cron

pg_cron is a PostgreSQL extension that schedules SQL jobs — VACUUM, data archiving, threshold notifications — directly inside the database as a background worker. No external cron, no credential sprawl, no silent failures. This guide covers installation, three real-world use cases, and the practices that keep pg_cron solid in production.
Database tutorial - IT technology blog

PostgreSQL Encryption at Rest: Protecting Sensitive Data with pgcrypto and Column-level Encryption

At 2 AM, database credentials leak far more often than hard drives get stolen — yet most teams rely on full-disk encryption and call it done. This guide walks through the four PostgreSQL encryption approaches, their real-world trade-offs, and a concrete implementation of column-level encryption using pgcrypto to protect sensitive fields even when someone has a valid database session.
Database tutorial - IT technology blog

Apache HBase: Wide-Column NoSQL Database for Sparse Data at Billion-Record Scale

Apache HBase is a wide-column NoSQL database built on Hadoop HDFS, purpose-built for storing and querying billions of sparse records with high write throughput. This guide covers the HBase data model, practical setup in Java and Python, how to design row keys that avoid hotspots, and a clear comparison against Cassandra and Cloud Bigtable to help you choose the right tool for your scale.