Error Handling in PostgreSQL: A Deep Dive into Subqueries and Variable Assignment

Variables in PostgreSQL Functions: A Deep Dive

How to Fix the 'Query Returned More Than One Row' Error When Using INSERT ... RETURNING in PostgreSQL

Understanding the Error: 'missing FROM-clause entry for table' - How to Fix and Optimize Your SQL Queries with Table Aliases

Improving Your PostgreSQL Triggers: A Deep Dive into "Create or Replace" Functions

Implementing Date Constraints with Triggers and Checks in PostgreSQL