Oracle DBA playbooks & tutorials

Real production tips, hands-on labs and career guidance written for working Oracle DBAs — the same problems we solve on live floors, broken down step by step. 89+ articles and counting.

📘 Production Playbooks🧪 Step-by-step Labs🎯 Career & Interview Prep📅 Updated Weekly

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From the DBNexus blog

Browse by topic, or scroll through the latest hands-on guides. Every article is grounded in production Oracle DBA work — no theory dumps, just what you actually run on the job.

All topics Oracle 26ai / AI Oracle RAC Data Guard Backup & Recovery Performance Patching & Upgrade GoldenGate OEM Exadata Oracle 19c Security Interview questions & answers Career & Training Oracle DBA

Data Guard

Configure Fast-Start Failover in Oracle 19c & 26ai Data Guard — Hands-On DGMGRL Lab (2026)

5 min read · Jun 2026

Oracle 26ai / AI

Fix a Full Tablespace in Oracle 19c & 26ai — 5-Minute DBA Playbook (2026)

6 min read · Jun 2026

Oracle 26ai / AI

Oracle 23ai AI Vector Search — Build Your First Vector Index in 15 Minutes (2026)

6 min read · Jun 2026

OEM

Install Oracle Enterprise Manager 24ai on Oracle Linux 9 — Step-by-Step DBA Lab in 60 Minutes (2026)

7 min read · Jun 2026

Oracle RAC

Add a Node to Oracle 19c RAC Using addnode.sh — Step-by-Step Lab in 30 Minutes (2026)

8 min read · Jun 2026

Oracle RAC

srvctl Cheat Sheet for Oracle 19c & 26ai RAC — 30 Production Commands Every DBA Must Know (2026)

8 min read · Jun 2026

GoldenGate

Oracle GoldenGate 23ai Microservices Setup on Linux — Step-by-Step Production Lab (May 2026)

7 min read · Jun 2026

Patching & Upgrade

April 2026 Oracle RU Patch Numbers Every DBA Must Know (19c / 21c / 23ai → 26ai)

6 min read · Jun 2026

Backup & Recovery

Recover a Dropped Table in Oracle 19c & 26ai — RMAN Table-Level PITR Lab in 20 Minutes (2026)

8 min read · May 2026

Exadata

Exadata Smart Scan Explained: How Cell Offload Cuts Database I/O by 90% on X11M (2026 Deep Dive)

8 min read · May 2026

Performance

Kill Blocking Sessions in Oracle 19c & 23ai/26ai — The 60-Second DBA Playbook (with MAX_IDLE_BLOCKER_TIME)

7 min read · May 2026

Data Guard

Oracle 19c Data Guard Switchover Using DGMGRL — Step-by-Step Lab in 10 Minutes (2026)

7 min read · May 2026

Oracle 26ai / AI

Oracle AI Database 26ai On-Premises: What DBAs Need to Know About the May 2026 Linux x86-64 Release

Oracle DBA playbooks & tutorials

From the DBNexus blog

Configure Fast-Start Failover in Oracle 19c & 26ai Data Guard — Hands-On DGMGRL Lab (2026)

Fix a Full Tablespace in Oracle 19c & 26ai — 5-Minute DBA Playbook (2026)

Oracle 23ai AI Vector Search — Build Your First Vector Index in 15 Minutes (2026)

Install Oracle Enterprise Manager 24ai on Oracle Linux 9 — Step-by-Step DBA Lab in 60 Minutes (2026)

Add a Node to Oracle 19c RAC Using addnode.sh — Step-by-Step Lab in 30 Minutes (2026)

srvctl Cheat Sheet for Oracle 19c & 26ai RAC — 30 Production Commands Every DBA Must Know (2026)

Oracle GoldenGate 23ai Microservices Setup on Linux — Step-by-Step Production Lab (May 2026)

April 2026 Oracle RU Patch Numbers Every DBA Must Know (19c / 21c / 23ai → 26ai)

Recover a Dropped Table in Oracle 19c & 26ai — RMAN Table-Level PITR Lab in 20 Minutes (2026)

Exadata Smart Scan Explained: How Cell Offload Cuts Database I/O by 90% on X11M (2026 Deep Dive)

Kill Blocking Sessions in Oracle 19c & 23ai/26ai — The 60-Second DBA Playbook (with MAX_IDLE_BLOCKER_TIME)

Oracle 19c Data Guard Switchover Using DGMGRL — Step-by-Step Lab in 10 Minutes (2026)

Oracle AI Database 26ai On-Premises: What DBAs Need to Know About the May 2026 Linux x86-64 Release

Oracle 19c Non-CDB to 26ai PDB Upgrade Using AutoUpgrade — Step-by-Step Lab (Same Host)

Oracle DBA Career Growth Guide 2026 — Skills, Salary & Enterprise Learning Path

Unlocking the Future of Database Management with Oracle AI Database 26ai Training

Advance Your Career as an Oracle DBA - Embrace Cloud Technologies

DBNexus: Your Partner in Database Excellence

Oracle AI Database 26ai: Top 5 Features Every DBA Must Know in 2026

Oracle 26ai vs 19c: What Changed and Why It Matters for DBAs

How to Explain RAC Node Eviction in a Client Interview – A Complete Guide for DBAs

New Oracle DBA Training Batch Starting April 4, 2026 – Weekend Morning Batch

Master RAC DBA Performance Tuning: Advanced Skills

Automate RAC DBA Patching-Master Cluster Updates

Oracle 26ai Features Deep Dive: Master New Tools

RAC DBA Skills-Master Cloud Migration Now

January 2026 Oracle Patch Update Unveiled Key Changes Every DBA Should Know

Oracle 26ai Installation on Oracle Linux 9 Using GUI and DBCA

Oracle AI Database 26ai (23.26.1) Now Available for Linux x86-64

Mastering Oracle Data Pump Guide for Efficiency

Understanding the Differences Between Oracle RAC SCAN Listener and LOCAL_LISTENER

Mastering Oracle DBA Interviews: Top 20 Scenario-Based Questions and Answers for Experienced Candidates

Exploring the Features and Benefits of Oracle Exadata X11M

Why the Oracle DBA Role Remains a Top Choice in Today's Job Market

New Oracle DBA Training Batch — Starting 17th January 2026

Oracle RAC on OCI vs On-Premises: Architecture, Performance, Cost & HA Explained

New Oracle DBA Training Batch Starting 10th January 2026 | Only 2 Days Left to Join

Comprehensive Guide to Oracle DBA Educational Programs

Master High-Availability Databases with Oracle RAC

October 2025 Oracle RU Patch Numbers Every DBA Must Know (19c / 21c / 23ai → 26ai)

Real-World Oracle Production Debugging: A Step-by-Step Playbook for DBAs

Mastering Oracle DBA Skills for Success

Enhancing Your Career with Oracle DBA Skills

Ace Your Oracle DBA Interview: An Interactive Study Guide

A Deep Dive into the OEM 24ai Interactive Guide

The Future-Ready DBA: Top 20 Interview Questions for Oracle Professionals in the Cloud and AI Era

Enroll Now for Master Oracle DBA 19c Program Starting July 12 2025

Oracle DBA 19c Advanced Online Training – New Batch Starts 26th April 2025

Oracle Enterprise Manager 24ai Installation Guide (2025) – Step-by-Step Tutorial for DBAs

Oracle 19c RAC Training Starts TOMORROW!

How to Install Oracle Database 23ai on Windows Server: A Step-by-Step Tutorial

Initial Load Extraction in Oracle GoldenGate 21.3 Microservices

Oracle DBA 19c Advanced Training | Job-Ready Course Starting 12th January – Enroll Now!

Oracle GoldenGate Microservices Hub Setup on RAC – Step-by-Step Guide

Top 10 Advanced Oracle DBA Interview Questions and Expert Answers

🚨 Oracle 19c Extended Support Update & Exciting Training Announcement 🚨

Announcing the New Oracle DBA 19c Advanced Training Batch - Starting November 30, 2024

Oracle RAC Training: Master Oracle 19c RAC with Expert-Led Course

Join Our Oracle DBA Training Program Starting September 23, 2024: Your Path to Becoming a Certified Oracle Database Administrator

Oracle 19c RAC Installation on Linux 9.4 - The Ultimate Step-by-Step Guide

Exciting Announcement! Our Oracle DBA Training Batch Starts August 3, 2024!

Mastering Oracle Data Pump (expdp, impdp) in Oracle Database!

Enhance Your Career with Our Oracle DBA Training Starting August 3, 2024!

🚀Create Your OCI Account: Unlock the Power of Oracle Cloud Infrastructure (OCI)🚀

Oracle Critical Patch Update Advisory - July 2024: Essential Information and Action Steps

Join Our Upcoming Oracle DBA Training Batch Starting August 3, 2024

Oracle Enterprise Manager Cloud Control 13c Installation Guide || OEM 13.5 Installation Step-By-Step

Master Oracle DBA 19c: Advanced Training Starting June 29, 2024 - Register Now!

Oracle 19c RAC Installation on Linux: Step by Step Guide

How to Perform RMAN Duplicate from Active Database: Detailed Tutorial

Unlocking the Secrets of Oracle Database: A Comprehensive Oracle DBA Interview Guide Questions/Answers

"How Can Cloud Computing Impact Database Administration? A Guide for DBAs" - Day 1

Explore Oracle Database 23ai || First Look and Installation on VirtualBox (Step-by-Step Guide)

Install Oracle 19c on Linux 9.3 ( Complete Guide - 2024 ) || Oracle Database Tutorial

Join Our New Batch for Oracle DBA Training Starting May 11th, 2024! - Oracle 19c

Master Oracle Databases: Comprehensive 3-Month Training Program

Taming the Tablespace Monster: Oracle Database Space Management Essentials

Oracle DBA Online Course: Unbeatable Pricing for Recorded Sessions! (40% Discount)