3 Ways to count the number of rows in a table in PostgreSQL
Counting rows in a PostgreSQL table is one of the most common operations for database administrators, developers, and data analysts.…
Fixing “psql: error: connection to server on socket “/tmp/.s.PGSQL.5432″ failed: No such file or directory”
This is one of the most common and frustrating errors PostgreSQL users—especially beginners—encounter when trying to connect to a local…
effective_cache_size in PostgreSQL: A Practical Deep Dive
Core Highlights & Actionable Takeaways 1. What the PostgreSQL Optimizer Does SQL’s core simplicity hides a complex decision-making process: when…
3 Ways to Create a Database in PostgreSQL: A Step-by-Step Guide
Creating a database is one of the foundational tasks in PostgreSQL administration. Whether you’re setting up a database for a…
How to Switch Users in psql: A Comprehensive Guide
psql (PostgreSQL’s command-line interface) is the primary tool for interacting with PostgreSQL databases, and switching between database users is a…
How to Use psql: A Comprehensive Guide to PostgreSQL’s Command-Line Client
psql is the official command-line interface (CLI) for interacting with PostgreSQL databases. It’s lightweight, powerful, and essential for database administrators,…
How to Create a New User and Assign Database Permissions in PostgreSQL
PostgreSQL, as a powerful open-source relational database management system (RDBMS), places strong emphasis on security and granular permission control. Properly…
How to Create Schemas and Tables in PostgreSQL
This guide walks you through the complete process of creating schemas and tables in PostgreSQL, including basic creation, associated usage,…
How to Check If a User Can Access or Modify a Table in PostgreSQL
In PostgreSQL, table access is not a single yes-or-no decision. A user might be able to: To accurately determine whether…
How to Check If a User Can Access a Database in PostgreSQL(The Right Way)
In PostgreSQL, being able to authenticate as a user does not automatically mean you can connect to a database. Connection…