HOW TO USE ORDER BY CLAUSE INSIDE UNION ALL QUERY
HOW TO USE ORDER BY CLAUSE INSIDE UNION ALL QUERY (USING ORDER BY CLAUSE IN EACH INDIVIAUAL QUERIES & JOIN THEM USNING UNION ALL) Author JP Vijaykumar Date March 8th 2016create table temp_jp(id...
View ArticleExadata – Clone RAC RDBMS Home
IntroductionExadata Database Machine is an ideal platform for database consolidation. With multiple databases running on the same Exadata DBM you want to isolate Oracle software binaries. There can be...
View ArticleNoSQL & Hadoop
Wiki articles on how to use Oracle with NoSQL and Hadoop will be found here.
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Oracle 12c RAC: Introduction to Grid Infrastructure Management Repository (GIMR)
What is Grid Infrastructure Management Repository (GIMR)Oracle Grid Infrastructure repository is a container (store) that is used to preserve diagnostic information collected by Cluster Health Monitor...
View ArticleOracle 12c RAC: Quick guide to GIMR administration
IntroductionIn my last article, we have explored about the architecture of GIMR in 12c. This article describes about the various options available to manage and maintain the Grid Infrastructure...
View ArticleOracle 12c: Correct column positioning with invisible columns
IntroductionIn 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 columns...
View ArticleOracle 12c: Data invisibility (archiving) with In Database Archival
IntroductionIn 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 ArticleOracle 12c: Invisibility is now extended to table columns
IntroductionOracle 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 ArticleOracle 12c: No more resource busy wait (ORA-0054) error while dropping index
IntroductionPrior 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 ArticleOracle 12c: Optimizing In Database Archival (Row Archival)
IntroductionIn 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 the...
View ArticleSophisticated Incremental Statistics gathering feature in 12c
OverviewIn 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 types...
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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...
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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...
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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 ArticleWhy 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 ArticleHow to keep data in partitioned tables equally distributed
As a DBA it is important to closely manage your space usage and understand the benefits that DB2’s architecture provides. This includes keeping data in partitioned tables equally distributed to gain...
View ArticleSpam posts showing up on Toad for Oracle home page
FYI. We sincerely apologize for the spam that got through onto your community forum last night. We have banned the poster and have removed their posts from the forum but unfortunately they are still...
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