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How to Enable and Disable Local Undo in Oracle 12.2
Article written by Deiby Gómez.Local Undo is a new kind of undo configuration for Multitenant Architecture and it is a new feature introduced in 12.2.0.1.0. A couple of weeks ago the documentation of...
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OTN Appreciation Day: Multitenant
Supporting the idea of Tim, I am writing this post to say that my favorite feature of Oracle Database is "Multitenant". Oracle Multitenant Architecture was introduced in Oracle Database 12.1.0.1 (12c)....
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Extents Allocation: Round-Robin
DBA's perform many tasks related to datafiles and tablespaces like creation of them but also creation of segments. Every segment as you know have extents and finally those extents are allocated in...
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SERVER=NONE in V$SESSION using Shared Server
When you are dealing with Shared Server there are some things that you have to know in order to understand what is going on in your database. Last night I was talking with a friend who asked me "Hey...
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Oracle Internals: Adding a column with default value
For this example I will use the following table:SQL> create table dgomez.t1 (id number, value varchar2(20)) tablespace tbs1;Table created.Let's insert 2 rows:SQL> insert into dgomez.t1 values...
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Oracle 12c Global and Session Sequences
In Oracle 12c we have two new keywords to create sequences: SESSION and GLOBAL as you can see in the following image that was taken from Oracle Database 12c SQL Reference:The definitions of these two...
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X Convención de Informática UMG San Marcos
Note: This article was written originally in Spanish. If you are reading this article in other language it is because of the automatic translator of ToadWorld.El pasado sábado tuve la oportunidad de...
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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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Invisible Columns in Oracle 12c
Starting in Oracle 12.1.0.1 there are several new features, +500 I have heard, and one of a good features for developers is "Invisible Columns". Invisible Columns allows a developer create a table...
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Oracle Developer Tour 2016 - Guatemala
El día lunes 21 de Noviembre del 2016 se llevó a cabo el primer Oracle Developer Tour en Guatemala, este es el único evento que puede reunir a expositores con Certificaciones de Java Master y Títulos...
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Oracle DB 12.2 Local Undo: PDB undo tablespace creation
The documentation of 12cR2 was released and with that several people are learning all the new features. There are some questions that people are starting to have, for example, when configuring Local...
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catcdb.sql and the util.pm issue in Oracle Database 12.2
A couple of days ago I was playing with Oracle Database 12.2.0.1.0 Enterprise Edition Extreme Performance (released last week in Cloud) and I tried to create a new Container Database. As per the 12.2...
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¿A bug after configuring Local Undo in Oracle 12.2?
So while playing with Local Undo configuration in my Oracle Cloud environment, using binaries Oracle Database 12.2.0.1.0 Enterprise Edition Extreme Performance I found the following strange scenario. I...
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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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Changing DB Parameters for Oracle Database on Amazon RDS
Nowadays, a DBA has to know how to administer a database on-premise but also on Cloud. Cloud is not the future, it's the present. Several databases are being moved from on-premise to Cloud. Since we...
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Near Zero Downtime PDB Relocation in Oracle Database 12cR2
IntroductionOracle has introduced in Oracle 12.1.0.1 in 2013 Pluggable Databases, since then Oracle has been enhancing its features for Multitenant. In Oracle 12.1.0.1 we had features to convert...
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¿A bug after configuring Local Undo in Oracle 12.2?
So while playing with Local Undo configuration in my Oracle Cloud environment, using binaries Oracle Database 12.2.0.1.0 Enterprise Edition Extreme Performance I found the following strange scenario. I...
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How to Enable and Disable Local Undo in Oracle 12.2
Article written by Deiby Gómez.Local Undo is a new kind of undo configuration for Multitenant Architecture and it is a new feature introduced in 12.2.0.1.0. A couple of weeks ago the documentation of...
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