Modern database environments demand more than just strong passwords and firewall rules. As teams grow and applications multiply, managing who can do what inside a PostgreSQL database becomes one of the most critical aspects of security architecture. This article explores … Read More
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PostgreSQL Anniversary: Technical Evolution and Enterprise Impact
HAPPY BIRTHDAY POSTGRESQL Executive Summary On July 8, 1996, PostgreSQL version 6.0 was officially released under an open-source license, marking the beginning of what would become one of the most sophisticated object-relational database management systems (ORDBMS) in enterprise computing. After … Read More
Mastering PostgreSQL Performance: A Complete Guide to Query Optimization and Database Tuning
PostgreSQL has earned its reputation as one of the most robust and feature-rich relational databases available today. Beyond its reliability and standards compliance, PostgreSQL’s sophisticated query optimization engine stands as a testament to advanced database engineering. However, even the most … Read More
Blue-Green Deployment for PostgreSQL Upgrade
Enhanced Minimal Downtime Upgrade & Zero Downtime Migration Strategy PostgreSQL 11 → 15.9 🎯 Objective: Upgrade PostgreSQL from version 11 to 15.9 using a Blue-Green strategy with: ✅ Zero downtime during data replication and testing ✅ Minimal downtime during upgrade … Read More
Comparing Modern SQL Databases: PostgreSQL vs MySQL vs OceanBase and Beyond
1. Introduction In today’s data-driven landscape, choosing the right database system can significantly impact application performance, scalability, and maintainability. Whether you are building a small web application, a financial system, or a globally distributed service, the database plays a central … Read More
Designing a Highly Available PostgreSQL Architecture Using HAProxy, Patroni, and etcd
Background In modern applications, database availability is critical. Downtime means not just a loss in revenue but also user trust. This article outlines our journey in designing a highly available PostgreSQL architecture using: – 5 PostgreSQL nodes (1 leader + … Read More
sqlstate and sqlerrm in PostgreSQL
what is sqlstate and sqlerrm ? All messages emitted by the PostgreSQL server are assigned five-character error codes that follow the SQL standard’s conventions for “SQLSTATE” codes. Applications that need to know which error condition has occurred should usually test the error code, rather … Read More
How to use Liquibase with PostgreSQL
What is Liquibase ? Liquibase is a database schema change management solution that enables you to revise and release database changes faster and safer from development to production. How liquibase works ? Liquibase uses SQL, XML, JSON, and YAML changelog files to list database … Read More
How to ‘Join’ in PostgreSQL
How we can accessed multiple table at a time? that were join queries came in handy. Queries that access multiple tables (or multiple instances of the same table) at one time are called join queries. They combine rows from one table with … Read More
Tags: full join, inner join, join, left join, right join
Introduction to PostgreSQL common table expressions or CTEs
A common table expression is a temporary result set which you can reference within another SQL statement including SELECT, INSERT, UPDATE or DELETE. Common Table Expressions are temporary in the sense that they only exist during the execution of the query. The following shows the … Read More
Tags: CTE, windowfunction