sql

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Oracle SQL INSERT … SELECT: Practical Techniques in 19c

IntroductionWhen you need to move or transform a large volume of data in one go, insert select is a go-to technique. Thi...
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Oracle SQL INSERT: Getting Started with Adding Data

IntroductionThe basic operation for adding a new row (record) to a database is oracle insert. This article explains the ...
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Log Review and Response Guide When Trouble Occurs

When an issue hits your oracle environment, the quickest recoveries start with a fixed plan for which logs to check and ...
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Dedicated Server Connection -For Those Who Want to Solve “Heavy Workloads” with Dedicated Server Connections

Introduction“When the number of connected users increases, server processes multiply too much.”“The response of batch jo...
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Oracle Database Shared Server Connections Explained Clearly and Accurately (Differences from Dedicated Connections / Configuration Steps / Monitoring)

Introduction“If the number of connected users increases, the number of processes explodes and slows down.”“If web applic...
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Oracle Database Synonyms: From Basics to Practical Use Explained Simply

Introduction“I want to remove schema names from my application SQL.”“I want to switch the referenced table depending on ...
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Listener Connection Failover and Load Balancing Explained

To improve the reliability and performance of Oracle Databases, proper configuration of failover and load balancing in l...
ADR_en

Oracle Database ADR (Automatic Diagnostic Repository): A Comprehensive Guide

IntroductionIn operating Oracle Database, quickly detecting and resolving errors or failures is essential for maintainin...
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Oracle Troubleshooting: 20 Common Errors and Their Solutions

When working with Oracle Database, you may encounter various errors. These errors can arise due to system misconfigurati...
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Complete Guide to NULL in Oracle Database

In Oracle Database, NULL is not just a blank field. It represents a special concept—"an unknown or missing value." Misha...