Oracle Read Only Tables

Starting from Oracle 11gR1, oracle allows us to change a table to be a read-only table. Let us have a quick demo: I'm connecting as user HR ( to a 19c pluggable database). I have a small table "DEPT": So, now I'm going to change the table to be read only table: Now let us … Continue reading Oracle Read Only Tables

After Oracle Database Upgrade to 12.2, Database Express Did not work

I upgraded one database from 11.2.0.4 to 12.2.0.1 on one Solaris Sparc server. After that I configured the Enterprise Manager Database Express, but when I tried to access it, I got the following error: For more information about Oracle Enterprise Manager Database Express, please refer to my post:https://ahmedfattah.com/2018/10/14/oracle-enterprise-manager-database-express-12c-overview/ Environment: Oracle Solaris 11Oracle Restart 12.2.0.1Oracle Database … Continue reading After Oracle Database Upgrade to 12.2, Database Express Did not work

Removing Oracle Database Software 12.2 (Grid + Database)

I have an Oracle Restart virtual machine that has both Oracle grid Infrastructure 12cR2 (12.2) and Oracle Database 12c R2 (12.2) + one CDB database called "orcl". I need to fully remove all oracle components from this machine. About the Deinstallation Tool Starting with Oracle Database 12c, the deinstallation tool is integrated with the database … Continue reading Removing Oracle Database Software 12.2 (Grid + Database)

The beauty of Visualization with Oracle Database

https://youtu.be/3N2wgayry4g ThanksAhmed

Oracle RAC 12c Installation on Linux

https://www.youtube.com/watch?v=E0bNMbOUbf8 ThanksAhmed

Oracle Database Password file presentation

https://youtu.be/sHUMO-uVYqU ThanksAhmed

Oracle Enterprise Manager Database Express 12c Overview

Oracle Database 12c introduced Oracle Enterprise Manager Database Express 12c. Oracle Enterprise Manager Express is a Web-based interface for managing an Oracle database. Using Oracle EM Database Express, you can perform basic administrative tasks such as user, performance, memory, and space management. Oracle Enterprise Manager Database Control is no longer available. EM Database Express is … Continue reading Oracle Enterprise Manager Database Express 12c Overview

Oracle Database Guard 12c Implementation with RAC (Step-by-Step)

Introduction: This is a real data guard implementation case for one of my clients. Data Guard is implemented between two clusters that reside on two different supercluster machines. The below procedure applies between any two clusters, it doesn't matter if it is a supercluster or Exadata or normal servers. I tried to put as much … Continue reading Oracle Database Guard 12c Implementation with RAC (Step-by-Step)

Oracle Database 12c Password File

Introduction: I (and we) used to see the oracle database password file under $ORACLE_HOME/dbs for both single instance and RAC databases. Example for RAC database: On node1 /u01/app/oracle/product/11.2.0/dbhome_1/dbs/orapwPROD1 On node2 /u01/app/oracle/product/11.2.0/dbhome_1/dbs/orapwPROD2 If one password file was changed in one node, then you have to copy it to all other nodes in the cluster. What is … Continue reading Oracle Database 12c Password File

Installing Oracle Apex 5.1.4 on Oracle Database 12c R2

This is a quick post on how to install Oracle Apex version 5.1.4 on Oracle Database 12.2 on Windows platform. 12cR2 Update: From Oracle Database 12c Release 2 (12.2) onward APEX is not installed by default, so you no longer need to worry about uninstalling APEX before creating PDBs. The software is still shipped with … Continue reading Installing Oracle Apex 5.1.4 on Oracle Database 12c R2