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My First Real GitHub ProjectMy First Real GitHub Project

February 22, 2018February 22, 2018 | Liron AmitziLiron Amitzi | 0 Comment | 5:53 pm

This is a short note just to say I’m happy to have my first GitHub project.A few months ago I wrote a blog post and a python script (on gist)

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Oracle Challenge #2 SolutionOracle Challenge #2 Solution

February 5, 2018February 5, 2018 | Liron AmitziLiron Amitzi | 0 Comments | 9:05 am

Apparently, quite a few people ran into this situation before, so I got a few correct answers  (some on Twitter, some on LinkedIn, and some as comments to the original

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Oracle Challenge #2Oracle Challenge #2

January 30, 2018January 30, 2018 | Liron AmitziLiron Amitzi | 6 Comments | 9:15 am

I posted my first challenge almost 2 years ago and there was a lot of interest in it. Today I post another one. Many years ago I saw this strange

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Two Multitenant InstancesTwo Multitenant Instances

January 24, 2018January 24, 2018 | Liron AmitziLiron Amitzi | 3 Comments | 9:11 am

I had a talk with a customer/colleague that got me thinking about a strange case of multitenant configuration. The chat was about an environment with two data centers and data

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RMOUG Training Days 2018RMOUG Training Days 2018

January 18, 2018January 18, 2018 | Liron AmitziLiron Amitzi | 2 Comments | 9:35 am

Next month RMOUG (Rocky Mountain Oracle User Group) will have their annual Training Days conference in Denver. In the past, being in Israel, I wasn’t exposed to most of these

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Installing PSU (GI+RAC+JVM)Installing PSU (GI+RAC+JVM)

January 16, 2018January 16, 2018 | Liron AmitziLiron Amitzi | 0 Comment | 9:30 am

I’ve installed quite a few PSUs in my professional life, but this time, it was something else. I’m talking about a RAC environment with 2 nodes and a database containing

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Importing Into Existing TablesImporting Into Existing Tables

January 3, 2018January 3, 2018 | Liron AmitziLiron Amitzi | 6 Comments | 8:15 am

I did some testing with impdp for a client. They asked me to write a procedure to import a set of tables from a production environment to a testing database.

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Order of Predicate Execution #2Order of Predicate Execution #2

December 13, 2017December 13, 2017 | Liron AmitziLiron Amitzi | 5 Comments | 9:19 am

In the previous post I talked about the order of predicate execution based on the predicate position and inline view.As promised, in this post I’ll add statistics and see what

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Impdp Resumable MysteryImpdp Resumable Mystery

December 5, 2017December 5, 2017 | Liron AmitziLiron Amitzi | 2 Comments | 9:31 am

Resumable operations are operations that can be suspended instead of failing, allowing us to fix the problem and resume the operation. When importing data using impdp, if (for example) a

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Order of Predicate Execution #1Order of Predicate Execution #1

November 28, 2017November 28, 2017 | Liron AmitziLiron Amitzi | 0 Comments | 8:20 am

In my previous post, I wrote about the parsing operation and what happens first. In the footnote I said that the order doesn’t affect performance, the cost based optimizer doesn’t

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