Getting Started with PL/SQL: A Beginner's Guide to Writing and Running Your First Script

Designing a Database Schema for Duplicate Primary Keys: A Many-to-Many Approach

Using Conditional Aggregation to Transpose Row Values into Column Headers without Pivot in SQL

Aggregating Pivoted Views Over Multiple Fields with Boolean Values Using UNION ALL Operations

How to Create Running Totals with Retroactive Dates in Microsoft Access 2010

Understanding Hibernate's Table Creation: How to Create the category_article Table Automatically

Understanding Oracle SQL Substring Functions: A Deep Dive into INSTR and SUBSTR

Excluding Results Based on Subquery: A PostgreSQL Example

Resolving 'Unknown Column' Errors with MySQL Triggers: A Step-by-Step Guide

Understanding Postgres Upserts without Incrementing Serial IDs: A New Approach Using NOT EXISTS