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Introduction to Application Containers in Oracle Database 12cR2
NOTE: This article was written using Oracle Public Cloud. Introduction:Developers and end users are the roles that mostly use the database. Developers keep fixing code, maintaining the legacy...
View ArticleHow to solve user errors with Oracle Flashback 12cR2 and its enhancements
Introduction:Flashback is a technology introduced in Oracle Database 10g to provide fixes for user errors. For example, one of the most common issues it can solve is when a DELETE operation was...
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Taking Care of Block Change Tracking While Duplicating Databases
By Deiby GomezBefore Oracle 12c, pluggable databases didn’t exist; whenever we wanted to clone a database we had use either RMAN Backup and Restore or RMAN Duplicate (Active or from backup location)....
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How to rename an ASM Diskgroup
Oracle ASM was introduced in Oracle Database 10g, since then, several enhancements were introduced with every version. Nowadays ASM is the most common filesystem used by the Database Administrators to...
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Oracle Database 12c Deferred Global Index
By Deiby GómezIntroduction:Before Oracle 12.1.0.1, whenever a table partition was dropped all the global indexes that were created on that table became UNUSABLE unless we specified the clause UPDATE...
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Introduction to Oracle SQL Plan Directives in Oracle Database 12.2
By Deiby Gómez Introduction:An Execution Plan is composed by the steps that the optimizer does in order to process a SQL statement. Oracle Optimizer always tries to find out the best execution plan for...
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Oracle Database Resource Manager for pluggable databases
By Deiby GómezIntroduction:Oracle Database Resource Manager enables you to limit database resources. Oracle has been enhanced in this regard in its new versions; for example, in 12.1.0.1, Database...
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Oracle Database 12cR2 new feature: Application Root Replica
By Deiby Gómez Introduction:In my previous articles we have seen concepts like “Application Containers” and “Proxy PDB”, which are new in Oracle Database 12cR2. With Application Containers, you can...
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How to run SQL Statements across Pluggable Databases with catcon.pl
By Deiby Gómez Introduction:Beginning with Oracle Database 12.1.0.1.0, DBAs started to work with Pluggable Databases. There were some large migrations of several databases from 10g/11g to 12c where...
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Oracle Database 12cR2 new feature: Container Maps
By Deiby GómezIntroduction:Oracle introduced a new cool concept called “Application Containers” in 12cR2 (12.2.0.1.0). I have already written about this topic in the article “Introduction to...
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Oracle Database 12cR2 new feature: Lockdown Profiles
By Deiby Gómez Introduction:In the past, roles, system privileges, and table privileges were used to control the functionalities allowed to database users. However, roles and privileges don’t have...
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Oracle Database 12cR2 new feature: Proxy PDB
By Deiby Gómez Introduction:The need to communicate with external systems and exchange data made Oracle develop a way to connect to different Oracle databases to execute operations. Traditionally,...
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oracle 12cR2 RMAN New Feature: UNTIL AVAILABLE REDO
By Deiby GómezIntroduction: Oracle has introduced several new features in its new version Oracle Database 12.2.0.1.0 and RMAN it is not the exception. Most of the DBA would agree that one of the...
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How to analyze Undo statistics to proactively avoid undo space issues
By Deiby GómezIntroductionIn my previous articles I explained two very important concepts about Undo Data; one is how Oracle manages the retention time and the other is how Oracle reuses the undo...
View ArticleOracle Database 12.2 - How to track index usage
By Deiby GómezIntroductionSeveral articles have been written about how to track the usage of indexes and there are several scripts to determine which indexes are being used after monitoring for a...
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Oracle EM 13c Database's historic data without DBA_HIST*
By Deiby GómezIntroductionData changes frequently in OLTP environments and Oracle has to be aware of those changes or at least to try detect these changes in order to adjust the optimizer and execute...
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Why Certifications Are Important
By Deiby GómezIntroduction:Ever since I started my career in Oracle technology I’ve always wanted to deliver the best support to my clients. I have wanted to solve the problems quickly. I am not afraid...
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Prepare yourself for passing the Oracle Certified Master 12c requirements!
By Deiby GómezIntroductionIn 2013 I began my preparation for becoming Oracle Certified Master (OCM) 11g. I was already OCP (Oracle Certified Professional) 11g and OCP 12c, so to get to the next level,...
View ArticleSolving Communication problems between DB and ASM instances
By Deiby Gómez IntroductionMost of the time I write how-to articles or I am introducing a new feature of Oracle Database. Those articles contain new information that’s good to know and help people fix...
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Oracle Database 12cR2 new feature: Container Maps
By Deiby GómezIntroduction:Oracle introduced a new cool concept called “Application Containers” in 12cR2 (12.2.0.1.0). I have already written about this topic in the article “Introduction to...
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