GrepOra Team

As already spoken, we are a group of friends that are crazy enough to share our experiences with you and with Oracle community as a payback of our own consumption.

In the next pages you are going to see some of our background and brief description professionally talking. So, by now, we are only going to share some photos of our occasional meetings.

(Maiquel, Matheus, Cassiano, Jackson, Dieison and Rafael)
(First GrepOra meeting)

(Maiquel, Rafael, Jackson, Matheus, Dieison and Cassiano)
(Last GrepOra Meeting – by now)

And this is it!
We hope you enjoy the book and the experience.

Let us know what you think about the book and the blog. Reach us out in social media like LinkedIn and Twitter. Collaborate and engage to Community!


About the Book


Welcome to our book, our blog and our world to have fun and view/review/learn/laugh with some of our struggles and personal notes for ourselves in the future.

Those posts are basically our notes with some of ours discovers and tips to review in the future. I believe everyone who works with that kind of technology have some personal notes, right? So, ours are being published to share with you.

We believe in sharing and mutual growing, so feel free to reach us to share your notes and tips, to fix anything you think to be wrong or can be better explained or everything. This is not only GrepOra team’s blog. This is our blog. Which includes you.

Ok then. But we are publishing a book? Just why? Who is the target audience? How should I read it? How is it structured? What should I expect?


This week we are completing 2 Years since the blog was created (in that time, called MatheusDBA). And we decided to review our best moments in these last years and compile them for you. It’s, above all, a good opportunity to refresh some posts that are still actual.

For who:

We are compiling it as a best moments review to engage new readers with the best past posts and reach that readers that enjoy to read a book in their mobile reading devices. Actually, we believe that writing material for this kind of media is the future (or the present), so if you prefer to read PDF files in you Kindle, Ipad, or similar, specially for those who prefer the offline mode to not being bothered by social media notifications, instant messages and other: This is for you. 🙂

How to read:

This is a book generated by the best posts in the blog. If you read the blog you know that the posts are not continuos and mostly have not relation between them. So, this is a book to read some curiosities and tips, to learn and review some useful stuff and to be aware about some daily basis challenges and struggles on working with Oracle technologies. This is not a book to be read in sequence, chapters or something like this. Feel free to read whatever you want and whatever you feel it’s interesting for yourself and to get richer your own experience with Oracle techs… Simple like that.

The structure:

There is no boundaries for our posts and ideas. Of course we have specialities, but everyone can write about everything. So there is no chapters of any restrictedly fixed boundaries. However, to give a little sense, we kind of organized the posts by following this (using our blog categories):

  • Oracle Database, RAC and Dataguard;
  • ASM;
  • Datapump, RMAN, Exp/Imp;
  • Enterprise Manager;
  • Application and Middleware;
  • Golden Gate and Data Integrator;
  • Linux and Shellscripts;
  • Cloud Computing;
  • Heterogeneous Databases;
  • Web Development and APEX;
  • PL/SQL and SQL Scripts;
  • Errors and Bugs.

What to expect:

Basically: “To read some curiosities and tips, to learn and review some useful stuff and to be aware about some daily basis challenges and struggles on working with Oracle technologies”. But mostly: To have fun! This is a book written by Oracle geeks to Oracle geeks.

Welcome to our world!

Author: Cassiano Roloff

20151217100542Innovative in everything he does, Cassiano acts as Oracle DBA since 2007 and works everyday with APEX since 2009. Cassiano is a great teammate and is always willing to help someone and learn new things.

Below you can find his Certifications list.


Oracle Database 10g Administrator Certified Professional – OCP 10g
Oracle Database 10g Administrator Certified Associate – OCA 10g

Author: Jackson Costa

aaeaaqaaaaaaaaldaaaajdq1mjnjowy3lwjkmjytngqwns05njq2ltu0nzzlmdblmtrimqFocused on Fusion Middleware and Application technologies, Jack is friend of everyone and always available to reach out the others. Jack has good architecture comprehension and skills to manage solutions on different technologies.



Author: Rafael Nolio

rafael3Passionate Database Administrator, experienced as consultant on heterogeneous environments and always trying new ways to do everything. Great as teammate, Rafael is always available to discuss new ideas and innovation.

Below you can find his Certifications list.


Oracle DBA Certified Associate 11g
Oracle Specialist Implementation Certified 11g

Author: Dieison Santos

dieisonProfessional in the IT area since 2006, working with Oracle applications and database. Solid experience in installation, customization and performance tuning of Fusion Middleware products.

Below you can find his Certifications list.

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Oracle Certified Associate, Oracle WebLogic Server 11g System Administrator

Author: Maiquel Oliveira

aaeaaqaaaaaaaafcaaaajge0nzziytdllty2mmetngmxzc1izme3ltrjztiwzjnlodgzywDetail-oriented, Maiquel has almost a scientific approach in all his duties. Maiquel is the GoldenGate guy, acting focused on Integration Solutions. Maiquel also keep studying and feel comfortable about databases.



Author: Matheus Boesing

chapeu2Database Administrator focused on infrastructure, HA and performance. Matheus is an enthusiastic about PaaS/DBaaS and Cloud Computing.

Oracle evangelist, Matheus is also passionate to keep learning and sharing. Matheus is founder of this blog and you can expect a post from him every Wednesday!


skype-logo_318-50258 ID:matheusdba

Oracle Database 12c Administrator Certified Professional (OCP)
Oracle Database 11g Performance Tuning Certified Expert (OCE)
Oracle Database SQL Certified Expert (OCE)
Oracle Real Application Clusters 11g Certified Implementation Specialist (OCS)
Oracle Database 11g Certified Implementation Specialist (OCS)
Oracle Database 11g Administrator Certified Professional (OCP)
Oracle Database 11g Administrator Certified Associate (OCA)
EXIN: Certified Integrator Secure Cloud Services
EXIN: Cloud Computing Foundation
EXIN: ITIL® Foundation Certificate in IT Service Management
EXIN: ISO/IEC 20000 – IT Service Management Foundation
EXIN: ISO/IEC 27002 – Information Security Foundation
EXIN: Green IT Citizen
ISACA: COBIT 4.1 Foundation for IT Services
Microsoft Technology Associate – SQL Server (MTA)

About the Blog

GrepOra is a blog between friends to learn and share about our daily experiences and challenges with Oracle technologies.

The blog started in Jan/2015 called MatheusDBA, focused in Oracle Database stuff, being written only by Matheus. In November 2015, ore authors specialized in other Oracle related technologies joined Matheus as new authors and the blog was renamed to

The common thing is that we all work with Oracle by different ways: Database, Middleware, Integration and Application. Someday we realized we’re always having conversations and frequently about Oracle stuffs. So we decided to make a “grep” in these conversations to filter those are related to Oracle and share.
And this is the origin for the name “” (or |GREP ORA).

Grepora is also our way to say “thank you” to community and return part of all learning we got through blogs and communities.

Feel yourself welcome to read the book and the blog, follow, share and get in touch with us.
It’ll be great to be with you in every post!

To know more about each one of us, access the Members section ( in the blog or take a look in next pages.
To understand the posting schedule, access Posting Schedule section in the blog (

Matheus , Maiquel, Dieison, Rafael, Jackson and Cassiano.



The content in this Blog  ( and Book is protected by intellectual work Brazilian Federal Law 9.610of February 19, 1998This content should not be published, distributed or transmitted without permission of the authors.

This is an independent siteThe opinions published here are personal and do not represent the opinion of Oracle or any other institution, as expressed on CC BY-NC 3.0

O conteúdo publicado neste Blog ( e Livro é obra intelectual dos autores, conforme previsto na Lei Federal do Brasil nº 9.610, de 19 de fevereiro de 1998. O conteúdo deste Blog não deve ser publicado, distribuído ou transmitido sem autorização prévia do seu autor.

Este é um site independente. As opiniões publicadas neste blog são pessoais e não representam a visão da Oracle ou qualquer outra instituição, conforme expresso em: CC BY-NC 3.0