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 ...
26ai_en 26ai_en Oracle GoldenGate 23ai Setup | DB 26ai Free Replication
This article explains the procedure for performing data replication between Oracle Database 26ai Free environments using...
26ai_en Oracle AWR Usage Guide: Steps to Generate Reports and Basics of Analysis [26ai Compatible]
Oracle AWR (Automatic Workload Repository) is the de facto standard for performance analysis in Oracle Database Enterpri...
26ai_en Oracle Statspack Usage: Installation and Automatic Snapshot Configuration in 26ai Free (PDB) Environment
Oracle Statspack is a powerful free tool for performance analysis in Standard Edition (SE2) and the latest Oracle Databa...
English Applied Oracle SQL Aggregation! Re-aggregating GROUP BY Results and ROLLUP
"I was able to calculate the total salary for each department. But how do I get the average of those department totals?"...
English A Comprehensive Guide to NULLIF and COALESCE Functions: Practical Applications
1. IntroductionHandling NULL values is unavoidable when working with Oracle databases. This article provides a detailed ...
English Oracle SQL: The Difference Between WHERE and HAVING! Execution Order and Usage
When writing SQL for Oracle Database, the difference between the WHERE clause and the HAVING clause is one of the most c...
English Oracle SQL Aggregate Functions: Handling NULLs and Using DISTINCT
"The total sum is less than expected." "The average value doesn't match my manual calculation."When performing data anal...
English How to Use Oracle SQL GROUP BY and HAVING! Aggregation and Conditions
"I want to calculate the total salary for each department." "I want to extract only classes with an average score of 80 ...
Data Types_en Explicit Data Type Conversion: The Basics and Applications for Error-Free SQL
In Oracle Database, the need to handle different data types arises frequently. When this happens, it is crucial to perfo...
26ai_en Oracle AI Database 26ai: Usage of BOOLEAN Data Type and New SQL Common Sense
Oracle AI Database 26ai, the latest Long Term Support (LTS) release, was announced in October 2025.In this version, the ...
26ai_en Oracle 26ai SQL Firewall Implementation and Verification Guide
Oracle AI Database 26ai / SQL Firewall / Injection Countermeasures / SecurityIn this article, I will explain the impleme...
English [Oracle SQL] Why is Deeply Nested Code Disliked? Learning “Appropriate Single-Row Function Nesting”
Single-row functions provided by Oracle Database are convenient tools that make data transformation and processing easy....
English 5 Essential Oracle SQL Aggregate Functions! How to Use SUM, AVG, and COUNT
Aggregate functions are essential for data analysis and report creation in Oracle Database. This article explains the us...
English [Oracle SQL] Replacing NULL with NVL/NVL2 Functions! Preventing Calculation Errors
In Oracle Database, the biggest cause of discrepancies in SQL aggregation and calculation results lies in the handling o...
26ai_en [Definitive Guide] The World’s Easiest Explanation of Oracle AI Vector Search & Hands-on
Hello everyone. Have you tried the currently trending "Oracle Database 26ai (and 23ai)" yet? Today, I will explain the n...
26ai_en Oracle GoldenGate 26ai is Here! Evolution and Outlook Based on 23ai
The latest version of data integration, "Oracle GoldenGate 26ai," was announced at Oracle AI World 2025. This version bo...
26ai_en [Oracle 26ai Free] The Story of Hitting the ORA-39712 Wall When Attempting a PDB Clone from 19c (Non-CDB)
Are you all trying out the latest Oracle Database 26ai Free? It is an engineer's nature to think, "I just want to bring ...
26ai_en [Verification] Moving from Oracle 19c to 26ai! Can DBLINK be used? Summary of Verification Procedures
Have you tried the latest Oracle Database 26ai (Free) yet? While attention is focused on AI features, as on-site enginee...
26ai_en Migrating from Oracle Database 19c to 26ai Free: Data Pump Practical Steps and Error Explanation
An increasing number of engineers are considering migrating from Oracle Database 19c to Oracle Database 26ai Free, the l...