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Search results “Oracle cost base optimizer”
Oracle Cost Based Optimizer Basics
 
02:12:35
When it comes to writing efficient queries there are a few key concepts that need to be understood. One of them is the Oracle Cost-Based Optimizer (CBO). Although it's called a cost-based optimizer it's actually not the cost we need to focus on primarily to understand why the optimizer makes certain decisions. In this webinar, you will learn the basics of the CBO, see why it is crucial that the optimizer's picture of the data fits reality, why cardinality and selectivity estimates matter so muc
Views: 58117 Redgate Videos
Oracle Cost Based Optimizer Advanced Session
 
01:40:21
Presented by Randolf Geist 01 August 2012 Summary Building on the previous Cost-Based Optimizer Basics webinar, in this almost "zero-slide" session we'll explore different aspects of the Cost-Based Optimizer that haven't been covered or only mentioned briefly in the 'basics' session. This is a continuous live demonstration including topics like: Clustering Factor, Histograms, Dynamic Sampling, Virtual Columns, Daft Data Types and more. If you've ever asked yourself why a histogram can be a threat to database performance and why storing data using the correct data type matters regarding Execution Plans then this session is for you. It is recommended, although not required, to watch the recording of the 'basics' webinar first. A live Q+A session with Randolf Geist will follow the presentation. For our complete archive, and to sign up for upcoming webinars please go to http://www.red-gate.com/oracle-webinars
Views: 6580 Redgate Videos
SQL: Optimizer- RBO/CBO (Part-1)
 
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In this Tutorial, you will know what is RBO and the disadvantages of it..
Views: 10251 radhikaravikumar
A Cost Based Optimizer
 
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50% Performance Tuning Course: https://www.udemy.com/sql-server-performance-tuning-101/?couponCode=Website
Views: 365 Mike
Optimizer Statistics
 
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Optimizer Statistics watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
Oracle tutorial : Using execution plan to optimize query in oracle
 
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Oracle tutorial: Explain plan for query optimization in Oracle PLSQL oracle tutorial for beginners using execution plan to optimize query sql query analyzer sql query cost analysis https://techquerypond.wordpress.com This oracle tutorial show you how to use EXPLAIN PLAN in oracle. This video covers how to check cost of the query from DBMS_XPLAN.DISPLAY . You can find the cost of the query using the Using EXPLAIN PLAN FOR and based on the result you can optimize the query for faster performance. Subscribe on youtube: https://www.youtube.com/channel/UCpiyAesWNYOXSz5GPq8lbkA For more tutorial please visit #techquerypond https://twitter.com/techquerypond
Views: 8923 Tech Query Pond
Oracle Optimizer Cost Calculation from explain plan
 
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This presentation describes the method to understand how oracle calculate cost during explain plan generation
Views: 678 debasis maity
Cost Based Optimizer in Apache Spark 2 2 continues -  Zhenhua Wang &  Wenchen Fan
 
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Apache Spark 2.2 ships with a state-of-art cost-based optimization framework that collects and leverages a variety of per-column data statistics (e.g., cardinality, number of distinct values, NULL values, max/min, avg/max length, etc.) to improve the quality of query execution plans. Leveraging these reliable statistics helps Spark to make better decisions in picking the most optimal query plan. Examples of these optimizations include selecting the correct build side in a hash-join, choosing the right join type (broadcast hash-join vs. shuffled hash-join) or adjusting a multi-way join order, among others. In this talk, we'll take a deep dive into Spark's cost based optimizer and discuss how we collect/store these statistics, the query optimizations it enables, and its performance impact on TPC-DS benchmark queries. Talk contributors: Zhenhua Wang (Huawei Technologies) and Wenchen Fan (Databricks) Session hashtag: #SFdd2
Views: 684 Databricks
In Their Own Words: Sayan Malakshinov, 2015 Devvy Winner
 
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Sayan is just finishing up his first decade focusing on Oracle Database application development, but in that time he has learned a lot and worked hard to share what he has learned with the broader community. An Oracle ACE Associate (2015), Oracle Certified performance tuning expert, and two-time PL/SQL Challenge Championship Playoff participant, Sayan specializes in Oracle Database performance. He is has deep knowledge of the Cost Based Optimizer, SQL, PL/SQL and Java. Check out all winners: https://community.oracle.com/community/database/awards ======================================== Practically Perfect PL/SQL with Steven Feuerstein Copyright © 2016 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Lecture 14 - Cost Based Optimization
 
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Thanks to Adam Raetz for the editing
Views: 690 Oliver Kennedy
ORACLE WORLD - Understanding Oracle Optimizer Statistics part-1st
 
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Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period.Oracle database Unbeatable,Unbreakable Platform..
Views: 6613 Oracle World
Oracle SQL Tuning - How to Read Execution Plans (Explain Plan)
 
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In this free tutorial you will learn how to generate and read (interpret) an execution plan in Oracle Databases. See more FREE Oracle Tuning tutorials at http://skillbuilders.com/free-oracle-tutorials. Understanding what the Oracle Database does with your SQL is essential to tuning - and the execution plan is the key. Oracle Certified Master DBA John Watson will provide a brief introduction (4 minutes) - which includes John's tuning methodology, then demonstrate EXPLAIN PLAN, SQL*Plus AUTOTRACE and DBMS_XPLAN.DISPLAY_CURSOR. In the tutorial, John will teach you: - How to read an execution plan - Find the 1st step in the plan - Decipher the order of the steps in the plan - That EXPLAIN PLAN can be very misleading Prerequisites: To get the most from this tutorial, you should: 1 Know how to code SQL 2 Be familiar with SQL*Plus 3 Know - in very general terms - what an execution plan is. 4 Have a basic understanding of the Library Cache (this is where Oracle Database stores parsed SQL statements) 5 Have a basic understanding of the Cost Based Optimizer (this is the part of the database that parses your SQL, creates an execution plan. Hopefully the correct - most efficient - plan).
Views: 62514 SkillBuilders
Interpreting Oracle Explain Plan Output - John Mullins
 
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Themis Instructor John Mullins presents some details on interpreting Oracle Database Explain Plan output. For more information visit http://www.themisinc.com
Views: 43800 Themis Education
Understanding the internals of GPORCA Optimizer
 
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GPORCA is a modular, cost-based query optimizer based on 30 years of database research. Simply put, it takes in a parsed query statement and returns what it considers to be the fastest execution plan for the database. It combines the query with metadata (e.g. statistics, schemas, etc.) and information about the database cluster to generate the execution plan. GPORCA is portable and modular because it can work with more than one database and can easily support new database operators.
Views: 394 Greenplum Database
Webinar: Optimize Oracle Response times with Cary Millsap
 
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During this webinar recording Cary Millsap, our Oracle ACE Director, talks to our VP of Client Services, Kyle Smith, about our technique – and why cloud makes performance management more important than ever. Your customers’ experience with the speed of your Oracle applications is an important differentiator. As you move to the cloud, delivering excellent performance experiences becomes even more challenging. Traditional Oracle performance management isn’t enough; our revolutionary approach enables you to understand exactly how your users experience your systems.
CSE562-2015-Lecture 18-Cost-Based Optimization
 
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CSE562-2015-Lecture 18-Cost-Based Optimization
Views: 582 Oliver Kennedy
Resource Prioritization using IBP Supply Optimizer
 
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This video provides a short demo on how we can model supply optimizer in IBP in order to achieve the most cost effective way of production in a multi resource scenario, based on resource cost and constraints.
Views: 496 IBP Live
14.514 Cost-Based Optimization, Plan Enumeration, Search Space, Catalan Numbers, Identical Plans
 
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Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.php?id=52&L=1 Master (in English): http://www.cs.uni-saarland.de/index.php?id=132&L=1 Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
Oracle 11g CBO New Features
 
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Learn what's different about cost-based optimization in 11g Release 2. In this training Dave Anderson will guide you through some critical performance and SQL tuning enhancements and other surprises in the Oracle 11g cost-based optimizer. Through live demonstrations and lecture, you will learn about features such as adaptive cursor sharing, feedback-based optimization, new join techniques, DBMS_STATS enhancements, direct (PGA) reads for "large" full table scans, new hints and more. Presented at NYOUG by SkillBuilders' Founder and Oracle DBA, Dave Anderson.
Views: 6876 SkillBuilders
14.502 Challenges in Query Optimization: Rule-Based Optimization
 
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My book "Patterns in Data Management" is now available both as an ebook or a print book (with color graphics!). See: http://amzn.to/1Ts3rwx This book is not a standard textbook on database techniques. This book was written extending and complementing preexisting educational videos (including this one). Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.p... Master (in English): http://www.cs.uni-saarland.de/index.p... Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
Oracle Internals  A Close Look at the CBO Trace
 
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Oracle 10053 Trace, Cost-based Optimizer Trace Review
Views: 733 Dan Hotka
Oracle SQL Tuning - Equal SQL is not Always Equal
 
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Learn how and why equivalent SQL statements can have a dramatic effect on performance. Certified Master J Watson demonstrates...See all our free Oracle Database tutorials at http://skillbuilders.com/free-oracle-tutorials. The Oracle Database cost-based optimizer (CBO) should recognize equivalent SQL statements and re-write them into the most efficient form. Well, nothing is perfect - not even Oracle Database. Sometimes the way you write your SQL can have a dramatic effect on performance. Presented by John Watson, Oracle Certified Master DBA. Some experience with SQL tuning is expected.
Views: 1870 SkillBuilders
Why do you need the Oracle Database Optimizer?
 
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Presentations explains the essential idea of the Oracle Database Optimizer
Views: 4401 Jean-Francois Verrier
GPO - ENPO 2006 - CBO (Cost Based Optimizer) - Jose Laurindo Chiappa
 
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Palestra sobre CBO, ENPO 2006 GPO GPO: GPO
Views: 139 Sergio Willians
Oracle Optimizer Performance Monitoring And Tuning 2 of 3
 
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In this tutorial you will learn advanced oracle tuning techniques for the optimizer.
Views: 449 DBA Pro
Cost Based Optimizer Framework for Spark SQL: Spark Summit East talk by Ron Hu/Zhenhua Wang
 
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In Spark SQL’s Catalyst optimizer, many rule based optimization techniques have been implemented, but the optimizer itself can still be improved. For example, without detailed column statistics information on data distribution, it is difficult to accurately estimate the filter factor, cardinality, and thus output size of a database operator. With the inaccurate and/or misleading statistics, it often leads the optimizer to choose suboptimal query execution plans. We added a Cost-Based Optimizer framework to Spark SQL engine. In our framework, we use Analyze Table SQL statement to collect the detailed column statistics and save them into Spark’s catalog. For the relevant columns, we collect number of distinct values, number of NULL values, maximum/minimum value, average/maximal column length, etc. Also, we save the data distribution of columns in either equal-width or equal-height histograms in order to deal with data skew effectively. Furthermore, with the number of distinct values and number of records of a table, we can determine how unique a column is although Spark SQL does not support primary key. This helps determine, for example, the output size of join operation and multi-column group-by operation. In our framework, we compute the cardinality and output size of each database operator. With reliable statistics and derived cardinalities, we are able to make good decisions in these areas: selecting the correct build side of a hash-join operation, choosing the right join type (broadcast hash-join versus shuffled hash-join), adjusting multi-way join order, etc. In this talk, we will show Spark SQL’s new Cost-Based Optimizer framework and its performance impact on TPC-DS benchmark queries.
Views: 875 Spark Summit
Cost-Based Optimization of Service Compositions
 
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To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, 45, KAMARAJ SALAI, THATTANCHAVADY, PUDUCHERRY-9 Landmark: Opposite to Thattanchavady Industrial Estate, Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com Cost-Based Optimization of Service Compositions For providers of composite services, preventing cases of SLA violations is crucial. Previous work has established runtime adaptation of compositions as a promising tool to achieve SLA conformance. However, to get a realistic and complete view of the decision process of service providers, the costs of adaptation need to be taken into account. In this paper, we formalize the problem of finding the optimal set of adaptations, which minimizes the total costs arising from SLA violations and the adaptations to prevent them. We present possible algorithms to solve this complex optimization problem, and detail an end-to-end system based on our earlier work on the PREvent (prediction and prevention based on event monitoring) framework, which clearly indicates the usefulness of our model. We discuss experimental results that show how the application of our approach leads to reduced costs for the service provider, and explain the circumstances in which different algorithms lead to more or less satisfactory results.
Views: 105 jpinfotechprojects
Pat Selinger, inventor of cost-based SQL optimizer, on Big SQL
 
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Inventor of cost-based SQL optimizer, IBM fellow Pat Selinger, introduces the topic of Big SQL. Apply to join the IBM Big SQL Technology Preview at: http://bigsql.imdemocloud.com/
Views: 181 SQLforHadoop
Understanding Oracle Explain Plans-Explain Plan Syntax
 
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Understanding Oracle Explain Plans-Explain Plan Syntax http://www.informit.com/promotions/webcast-understanding-oracle-explain-plans-140966 Watch an excerpt from experienced trainer Dan Hotka on Explain Plan Syntax. The full webcast shows you how to work with Explain Plans, then goes into considerable detail about exactly how Oracle arrives at an Explain Plan. Dan has a thorough understanding of how the Cost-Based Optimizer works, and shares that knowledge in this presentation. You will gain valuable insights as to how Oracle processes SQL, and many tips on how to improve SQL performance. This presentation is a must-see for anyone doing SQL tuning. http://www.informit.com/promotions/webcast-understanding-oracle-explain-plans-140966
Views: 536 InformIT
Oracle Database 12c Security - Oracle Virtual Private Database (VPD)
 
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Learn how to use Oracle Virtual Private Database (VPD) to secure your data. See all lessons at http://skillbuilders.com/12c-TSDP-Tutorial First, Virtual Private Database. What is it? Answer: It's a declarative technique for enforcing security. Typically, it's based on user application context. That was the first limitation of 8i. Backed with 8i context were session-specific. The context variables were sort in the PGA. That means you simply couldn't use this in a web environment. However, global context, with use of 9i, Virtual Private Database became usable for web applications with connection pooling. But whether you're using it to client server or on a three tier environment, it's declarative technique rather than a programmatic technique. I can go behind the back of the application as a DBA and generate predicates to get appended to all SQLs. Select, insert, update, delete the end users. Issue the SQL and I will generate a predicate that filters the access. It's impossible to bypass. All users will have predicates appended to all their code. It doesn't matter whether they're using SQL Plus, Discoverer, Business Objects, Crystal Reports, eBusiness Suites, whatever they're using, I as DBA can filter their access to roles. The end result, different users see different data sets while running the same code and accessing the same tables, hence, the name Virtual Private Database. Different users will think they're seeing a totally different set of tables, but in fact it's one column database, one set of tables hosting a single application shared by all the users. The mechanism - you can apply VPD to tables, to views, to synonyms, and a declarative technique. Once the technique you write a function that generates the predicate, you associate the function with the table. From then on whenever the user issue SQL against that table the Cost-Based Optimizer rewrites the code. The Cost-Based Optimizer rewrites the user SQL to call the function to generate the predicate. The predicate is then appended to the SQL and it's the modified SQL that is parsed and executed. Let's see how this actually works. I'm working here by the way. This is just a perfectly normal 12.1 database. But what I'm going to demonstrate at this point will in fact work on 11g as well. I'm not going to be using any of the 12c enhancements to VPD for this little demonstration. I'll work in the scott schema. What do we have to do? We write a function to generate the predicate string. Create function. And I'll my function vpdf. The function must conform to a fixed specification. It must take two varchar arguments. One of the arguments is intended to be the schema to which the function will be applied. The other argument is the object within the schema to which the function will be applied. And it must return a varchar2, which is the generated predicate. Let's begin. Within this function you can do just about anything. There are some limitations. It's impossible for the function to query or update the table against which the VPD calls here is going to be applied or we violate the rules of purity that we come across so often with PL/SQL. But apart from that, it can do just about anything - including a number of dreadful side effects can be introduced by writing VPD functions. I'm going to do a very simple one on this one. I'll shall simple return immediately a predicate. What predicate? Ename, which is the ename column from this scott.emp table. Ename should equal sys_context. I'll go to the local context, my user end context, and just extract session user. We can see that John has tested this earlier today and therefore the object already was suggesting and he's just dropping it now and cleaning up the recreate. I hope you realize these really are live demonstrations. I'm not just running scripts. I've created a function. What's that function going to do? It's going to return this value here. Test it. Always test it and see what it's actually going to do. I'll select vpdf. I have to give it a couple of arguments. This one will do for now.
Views: 4371 SkillBuilders
Presto query optimizer: pursuit of performance
 
59:53
Presto, an open source distributed SQL engine, is widely recognized for its low-latency queries, high concurrency, and native ability to query multiple data sources. Proven at scale in a variety of use cases at Facebook, Airbnb, Netflix, Uber, Twitter, Bloomberg, and FINRA, Presto experienced an unprecedented growth in popularity in both on-premises and cloud deployments in the last few years. Inspired by the increasingly complex SQL queries run by the Presto user community, engineers at Facebook and Starburst have recently focused on cost-based query optimization. In this talk we will present the initial design and implementation of the CBO, support for connector-provided statistics, estimating selectivity, and choosing efficient query plans. Then, our detailed experimental evaluation will illustrate the performance gains for several classes of queries achieved thanks to the optimizer. Finally, we will discuss our future work enhancing the initial CBO and present the general Presto roadmap for 2018 and beyond.
Views: 113 DataWorks Summit
SQL: Explain Plan for knowing the Query performance
 
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In this tutorial, you'll learn how to compare queries to know the better performance query..
Views: 92903 radhikaravikumar
Cost-Based Optimization of Service Compositions
 
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To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, 45, KAMARAJ SALAI, THATTANCHAVADY, PUDUCHERRY-9 Landmark: Opposite to Thattanchavady Industrial Estate, Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com Cost-Based Optimization of Service Compositions For providers of composite services, preventing cases of SLA violations is crucial. Previous work has established runtime adaptation of compositions as a promising tool to achieve SLA conformance. However, to get a realistic and complete view of the decision process of service providers, the costs of adaptation need to be taken into account. In this paper, we formalize the problem of finding the optimal set of adaptations, which minimizes the total costs arising from SLA violations and the adaptations to prevent them. We present possible algorithms to solve this complex optimization problem, and detail an end-to-end system based on our earlier work on the PREvent (prediction and prevention based on event monitoring) framework, which clearly indicates the usefulness of our model. We discuss experimental results that show how the application of our approach leads to reduced costs for the service provider, and explain the circumstances in which different algorithms lead to more or less satisfactory results.
Views: 268 jpinfotechprojects
ORACLE WORLD-Understanding Oracle Optimizer plans part-3rd
 
17:35
Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period.
Views: 1508 Oracle World
Storage Optimization - Reducing the Cost of your Oracle Database Estate (Recorded Webcast Event)
 
46:56
Information is key to the success of most organisations today and as such the more information you have about your customers the better business decisions you can make. T his means that databases (which hold the information) continue to grow in size and additional storage needs to be purchased on a regular basis to meet this growth. In this webcast we'll look at how Storage Optimization techniques can be used to reduce the Oracle database footprint and avoid the cost of new storage and/or reclaim some of that storage for use by other systems. We'll also take a look at some of the tools available to help you understand the likely benefit you will see from this reduced footprint and how we can work with you to look at the cost justification. Presented by Paul Dickinson and Horia Berca Copyright © 2014 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the "Materials"). The Materials are provided "as is" without any warranty of any kind, either express or implied, including without limitation warranties of merchantability, fitness for a particular purpose, and non-infringement.
Query Processing and Optimization : Query Tree, Evaluation Plan & Engine, Query Cost, Algorithms
 
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Exclusive range of revision notes & video lessons available on our site |||--- ClicK LINK To ViSiT ---||| http://www.studyyaar.com/index.php/module/28-query-processing-and-optimization This video clip is part of module available at http://www.studyyaar.com/index.php/learning-program/7-database-management-system-part-2
Views: 79934 StudyYaar.com
Why is my Oracle Database Slow? The SQL Developer Performance Dashboard
 
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Oracle SQL Developer's product manager, Jeff Smith, takes you through the Instance Viewer: a performance dashboard for your Oracle Database. See expensive queries, wait event break downs, and more!
Views: 888 Jeff Smith
ORACLE WORLD-Understanding Oracle Optimizer plans part-4th
 
19:11
Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period.
Views: 1429 Oracle World
Query Optimization - Equivalence of Expressions & Cost Based Optimizations
 
05:01
Complete set of Video Lessons and Notes available only at http://www.studyyaar.com/index.php/module/28-query-processing-and-optimization Equivalence of Expressions, Equivalence Rules, Minimal set , Cost based optimizations http://www.studyyaar.com/index.php/module-video/watch/75-query-optimization-equivalence-of-expressions-and-cost-based-optimizations
Views: 4955 StudyYaar.com
Pivotal Query Optimizer for Greenplum Database: Overview and Demo
 
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The query optimizer available in Greenplum Database (open source project name: GPORCA) is the industry’s first cost-based query optimizer for big data workloads. It can scale interactive and batch mode analytics to large datasets in the petabytes without degrading query performance and throughput. To test the query optimizer, please download the Greenplum Sandbox that is available on http://www.greenplum.org The open source project for the Pivotal Query Optimizer is at: https://github.com/greenplum-db/gporca
Views: 595 Greenplum Database
Optimizing SQL Queries in Oracle - What is the Query Optimizer?
 
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This video clip, on the Oracle Query Optimizer, is taken from my www.pluralsight.com course "Optimizing SQL Queries in Oracle". Click here to learn more about this course: http://www.pluralsight.com/courses/optimizing-sql-queries-oracle?utm_source=youtube&utm_medium=video&utm_campaign=authordemo.
Views: 1924 sheepsqueezersYT
How The Query Optimizer Works
 
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http://bit.ly/1EJsBPK Code Above Is For Performance Tuning Course. Limited Number at this price.
Views: 2806 Mike
Oracle 11gR2 Performance Tuning
 
20:24
Learn Oracle Performance Tuning with Real Time Activities. Watch this video to see how HARD PARSING issue can be rectified with simple resolution. This course will load the system and show you a real time approach to resolve performance issues on your environment. Get more details at : www.orskl.com/training Queries? WhatsApp: +919951696808 Get your hands dirty now and become performance tuning expert.
Views: 9328 OrSkl Academy
SQL Tuning 101
 
56:32
Presenter: Carlos Sierra, Oracle Corporation SQL Tuning is a complex and intimidating area of knowledge, and it requires years of frequent practice to master it. Nevertheless, there are some concepts and practices that are fundamental to succeed. From basic understanding of the Cost-Based Optimizer (CBO) and the execution plans, to more advanced topics such as plan stability and the caveats of using SQL Profiles and SQL Plan Baselines, this session is full of advice and experience sharing. Learn what works and what doesn't when it comes to SQL Tuning.
Views: 98 ODTUG
Effective PL_SQL with Tom Kyte (English)
 
01:07:55
Presentation done by Tom Kyte in Sao Paulo, Brazil for the 1st LA OTN Tour in 2010
Views: 2675 OracleMania

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