Recent Posts (oracle)
Indexes vs. Partitions in RDBMS: Understanding Their Differences and Power Together
- By Ercan
- 08/11/2025
When a query runs slowly, most developers instinctively think: “We need an index.” But while indexes are essential, they’re only part of the performance equation. In large-scale systems, data placement matters just as much as data access. That’s where partitioning comes in. Together, indexes and partitions can turn a sluggish query into a lightning-fast one — if designed correctly. This article explores how indexes and partitions differ, where they overlap, and how combining them strategically can yield remarkable performance improvements. Indexes and Partitions: Similar Goals, Dif..
Advanced Oracle SQL Query Examples
- By Ercan
- 15/06/2025
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 ..