Recent Posts (oracle)

Advanced Oracle SQL Query Examples

• By Ercan
• 15/06/2025
• 0 comments

When working with Oracle databases, you often go beyond simple SELECT statements. Real-world data is hierarchical, analytical, and sometimes messy. In this article, we’ll explore powerful Oracle SQL techniques that solve complex data problems — using realistic examples and sample tables. We’ll cover partitions, hierarchies, analytics, and more. Each example includes setup scripts and queries you can run directly in your Oracle environment. Sample Schema Setup Let’s start by creating two simple but related tables: departments and employees. CREATE TABLE departments ( dept_id ..