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The Database Handyman

My notes about Oracle Database, APEX, OEM Cloud Control and whatever I learn

SQL Query performance

Correlated Subquery to Analytics

November 25, 2016October 31, 2020 Aamir

At work I came across a query that was using correlated sub select and I thought it is worth sharing. I have seen many queries

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Oracle Database 11gR2

Oracle 11gr2 Dataguard – Resolving ORA 19909

October 21, 2016October 29, 2020 Aamir

Just wanted to write quick blog about an error we got on Standby Database and steps I performed to resolved it.  Saved me from re-building

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Oracle Database 11gR2 Oracle Database 12cR1

Advance Active Session History

September 20, 2016 Aamir

I attended a session in Oracle Open World 2016 given by Kyle Hailey. In his presentation Kyle talked about how to measure database performance and

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Oracle Database 11gR2 Oracle Database 12cR1 Shell Script

Variables: Shell Variables in SQL*PLUS

March 16, 2016March 15, 2016 Aamir

This is the second part of my blog about Shell scripting with focus on Oracle database. Here is an example of how you can use

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Oracle Database 11gR2 Oracle Database 12cR1 Shell Script

Variables: Shell, SQL*PLUS and PL/SQL

March 11, 2016March 15, 2016 Aamir

I am going to start blogging about shell scripting tips and technique focusing on database and how they can be used to make DBA life easier.

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Oracle Database 11gR2

Generate Meta Data Since Last Restore Point

February 28, 2016March 12, 2016 Aamir

I was asked if it was possible to generate all ddl since last restore point. I came up with following script. It might help others

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OEM Cloud Control 12c Oracle Database 11gR2

Oracle Database Service

January 29, 2016January 29, 2016 Aamir

Recently at my work place for the first time, I planned and executed QA environment failover test to standby database and was asked how come

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Oracle Database 11gR2 Oracle Database 12cR1

How to Flush SQL Cursor Cache from Oracle Library Cache

December 5, 2015 Aamir

All most all of Oracle DBAs are familiar with command to flush shared pool: alter system flush shared_pool; This command clears all data from shared

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OEM Cloud Control 12c

Important Steps Before Upgrading OMR database to 12c PDB

November 21, 2015 Aamir

Here are some important steps that needs to be done before you upgrade Oracle Managed Repository (OMR) database to 12c PDB. First you have to

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Oracle Database 11gR2

How to Clone Oracle Grid Infrastructure / Restart and database Home

November 14, 2015 Aamir

Following instructions can be used to clone Oracle Grid Infrastructure Restart from already working Oracle Linux Server to another new server.  This method can save

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About Me

Welcome to The Database Handyman! I’m Aamir Haroon, a Senior Cloud Data Architect with over a decade of experience. I specialize in optimizing, managing, and migrating databases to ensure your data works smarter for you. With certifications such as Google Cloud’s Professional Cloud Database Engineer and AWS Certified Database – Specialty, I bring industry best practices to every project. Let’s tackle your database challenges together—reach out today!

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Recent Posts

  • Improve Reliability in PostgreSQL 17: Leveraging Logical Replication Failover January 28, 2025
  • Oracle Standby Database Parameters in PDB January 30, 2022
  • Upgrade Standby Database December 6, 2020
  • Patch Oracle GI and DB Software Only And Create Gold Image November 24, 2020
  • Enforce Execution Plan of “hinted” SQL To “non-hinted” SQL November 9, 2020
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