26ai_en Oracle 26ai RAC Setup Procedure ① 【GI・Grid Infrastructure】
Do you want to build the latest version of Oracle Database, Oracle 26ai Real Application Clusters (Oracle RAC), but find...
26ai_en English NTP Server (Chrony) Setup Guide for Oracle RAC Construction
In an Oracle Real Application Clusters (Oracle RAC) environment, ensuring that the time on all nodes is accurately synch...
English DNS Server Setup Guide for Oracle RAC Construction (Full Version)
This document explains the procedure for constructing a DNS server and configuring clients to meet the requirements of O...
English How to Use the Oracle SQL TRUNCATE Statement: Differences from DELETE and Optimization
When deleting large amounts of data, have you ever experienced issues like "the process never finishes" or "the UNDO tab...
English Oracle SQL: Correct Way to Write Joins for 3 or More Tables and Non-Equi Joins
In business system development and data analysis, there are frequent scenarios where you need to retrieve information by...
English Oracle SQL: Enhancing DML with Subqueries! INSERT/UPDATE/DELETE Usage Strategies
"I want to register data using search results from another table.""I want to update rows matching specific conditions ba...
26ai_en Oracle Smallfile vs Bigfile Differences and Best Practices: A DBA’s Operational Guide
In the physical design of an Oracle Database, the choice of tablespace management method directly impacts future scalabi...
26ai_en Oracle 26ai Tablespaces Default to Bigfile? Verification and Precautions
In Oracle Database 26ai (version 23.26.1 and later), the latest release for 2026, Oracle 26ai tablespaces are configured...
English Oracle SQL Set Operators: How to Use UNION ALL, MINUS, and More
Have you ever wanted to compile data scattered across multiple tables into a single list, or compare two datasets to ext...
26ai_en How to Verify Applied Patches in Oracle 26ai: The Reality of the Latest RU 23.26.1.0.0
In January 2026, the long-awaited Oracle Database 26ai installer was released. To fully leverage the latest AI capabilit...
English Oracle SQL Non-Scalar Subqueries: How to Handle Multiple Rows and Columns
When extracting complex data with SQL, "subqueries" are unavoidable. However, do you struggle with the error "single-row...
English Introduction to Oracle SQL Subqueries! From Basics to Speed Optimization
Do you ever struggle when writing SQL, thinking "I want to use the result of another aggregation in a condition" or "I w...
English Oracle SQL Scalar Subqueries: From Basics to Optimization Strategies
When extracting data with SQL, do you ever struggle with requirements like "I want to fetch just one value from another ...
26ai_en Oracle Database 26ai Complete Deletion Guide: How to Use the deinstall Command
Are you looking for a safe and reliable way to uninstall Oracle? Manual deletion using rm -rf can leave configuration fi...
English Complete Guide to Oracle SQL Table Joins (JOIN)! Mastering with Diagrams and Samples
"Table Joins (JOIN)" are an unavoidable part of working with databases."Should I use an inner join or an outer join, and...
26ai_en Oracle GoldenGate 23ai Operations Guide: Startup/Shutdown Procedures and Permission Settings
This document outlines the standard startup and shutdown procedures for Oracle GoldenGate 23ai (Microservices Architectu...
26ai_en [Verification] Tried Installing Oracle AI Database 26ai (Single) on OL8
Oracle AI Database 26ai was released the other day. I was able to download it immediately, so this time I tried installi...
26ai_en [Breaking News] Oracle AI Database 26ai On-premises Download Available! OSDC Availability and GI Support
Updated Jan 28, 2026: The highly anticipated on-premises version (Linux x86-64) of Oracle AI Database 26ai and Oracle Gr...
26ai_en [Diagram] Oracle GoldenGate Process Architecture Mechanics | Classic vs MA
When handling Oracle GoldenGate (OGG) in practice, the most important thing is to accurately understand the "Data Flow" ...
26ai_en Oracle GoldenGate 19c/23ai Overview: Differences Between MA and Classic
Oracle GoldenGate is the de facto standard tool for real-time data integration between Oracle Databases. Its importance ...