Wiki Page: Oracle 12c: Data invisibility (archiving) with In Database Archival
Introduction In today's article, I am going to discuss about yet another cool feature introduced with Oracle Database 12c. This feature provides an ability to the data to make itself invisible when...
View ArticleWiki Page: Oracle 12c: Invisibility is now extended to table columns
Introduction Oracle Database 12c has brought a never ending list of new features and today I would like to talk about another new feature from this list. Oracle had introduced invisible indexes in...
View ArticleWiki Page: Oracle 12c: Correct column positioning with invisible columns
Introduction In one of my last article, I had discussed about Invisible Columns in Oracle database 12c. I had also mentioned that, invisible columns can be used as a method to change ordering of...
View ArticleWiki Page: Oracle 12c: Optimizing In Database Archival (Row Archival)
Introduction In my last article, I had discussed about the Oracle 12c new feature In Database Archival . We had explored this new Oracle database feature and how it can be used to archive data within...
View ArticleWiki Page: Oracle 12c: No more resource busy wait (ORA-0054) error while...
Introduction Prior to Oracle database 12c, dropping an index was always an EXCLUSIVE (offline) operation, which required locking the base table in exclusive mode. This sometimes cause the resource busy...
View ArticleWiki Page: Sophisticated Incremental Statistics gathering feature in 12c
Overview In typical data warehousing environment existence of huge partitioned tables is very common, gathering statistics on such tables is challenging tasks. For partitioned tables there are two...
View ArticleWiki Page: Streaming MySQL Table Data to Oracle NoSQL Database with Flume
Consider the requirement that data is added to MySQL Database from the MySQL Command Line Interface (CLI) and a copy of the data is to be made available for another application or user in Oracle NoSQL...
View ArticleWiki Page: Streaming Oracle Database Logs to HDFS with Flume
Apache Flume is a service based on streaming data flow for collecting, aggregating and moving large quantities of log data. A unit of data flow in Flume is called an event. Flume is made of three...
View ArticleWiki Page: Streaming Oracle Database Logs to HBase with Flume
In the previous tutorial we discussed streaming Oracle logs to HDFS using Flume. Flume supports various types of sources and sinks including the HBase database as a sink. In this tutorial we shall...
View ArticleWiki Page: Why dirty buffers are flushed to disk whenever object is dropped ??
Sometimes when we drop objects it may take brief period of time to complete the operation. One of the many activities performed by Oracle during this duration is to flush all the dirty buffers related...
View ArticleBlog Post: Help Celebrate One Million Answers at the PL/SQL Challenge!
Sometime in the next couple of months, someone will submit the 1,000,000th answer on the PL/SQL Challenge. And Chris Saxon, member of the AskTom Answer Team, SQL Wizard and Database Design Quizmaster,...
View ArticleBlog Post: Retaining Previous Agent Images, the Why and the How
I appreciate killing two birds with one stone. I’m all about efficiency and if I can do satisfy more than one task with a simple productive process, then I’m going to do it. Today, I’m about to: Show...
View ArticleBlog Post: Creando un Gráfico de Barras en Oracle APEX 5.0
Sabemos que los gráficos son muy necesarios a la hora de querer presentar nuestros reportes en nuestras aplicaciones en APEX, ya que le permite al usuario ver los datos de forma más visual y es por...
View ArticleBlog Post: Configuring RStudio Server for Oracle R Enterprise
In this blog post I will show you the configurations that are necessary for RStudio Server to work with Oracle R Enterprise on your Oracle Database server. In theory if you have just installed ORE and...
View ArticleBlog Post: Adding a Database to the Raspberry Pi Zero
This morning, after someone added SQL Developer to a Raspberry Pi 3, Jeff Smith pinged me and the question was posed, as it often is, can you run Oracle database server on a Raspberry Pi, (RPI)? The...
View ArticleBlog Post: The Case of the Confusing CASE
This odd little piece of code was featured in the weekly PL/SQL Challenge quiz 12 March - 18 March 2016 . What do you think will be displayed after executing the following block? DECLARE my_flag...
View ArticleBlog Post: Oracle y la distancia de Levenshtein
La semana pasada asistí a una capacitación de ACL, una herramienta para el análisis de datos muy utilizada por auditores y contadores. Al abordar el tema de funciones, el instructor presentó una...
View ArticleBlog Post: AWR Warehouse Fails on Upload- No New Snapshots
This issue can be seen in either EM12c or EM13c AWR Warehouse environments. It occurs when there is a outage on the AWR Warehouse and/or the source database that is to upload to it. The first...
View ArticleBlog Post: Gold Agent Image
The Gold Agent Image is going to simplify agent management in EM13c, something a lot of folks are going to appreciate. First step to using this new feature is to create a image to be used as your gold...
View ArticleBlog Post: Secretos del comando DESCRIBE
El comando DESCRIBE no resulta desconocido para aquellos que alguna vez utilizaron SqlPlus. El comando DESCRIBE nos permite obtener la definición de una tabla, vista, sinónimo, función o procedimiento....
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