Tech by KJ

What is Oracle APEX? Oracle APEX (Application Express) is an enterprise low-code platform that enables you to build scalable, secure web and mobile applications quickly. It runs natively within the Oracle Database, allowing developers to build feature-rich apps using SQL and PL/SQL with minimal traditional programming. Getting Started with Oracle APEX Prerequisites You must have an Oracle database, preferably a pluggable database, installed on the server where the APEX installation is going to be performed. Certain APEX versions require different version databases. In this case, I used APEX 24.2 with an Oracle Database release 19c (base release). But for higher APEX versions, such as APEX 26.1, you require Oracle Database release 19c with Database Release Update 19.18 (January 2023) or newer. You can follow this guide on Installing Oracle Database 19c  to configure a database in your environment. APEX installation is usually done via the same user you used to configure the DB. Step...

 How to Back Up an Oracle Database Using Data Pump (expdp & impdp) Oracle Data Pump is a high-performance utility for exporting ( expdp ) and importing ( impdp ) data and metadata between Oracle databases. It enables fast, flexible and secure data movement for tasks like database backups, migrations and schema transfers. expdp creates dump files of database objects, while impdp restores them into a target database. Data Pump supports parallel execution, fine-grained filtering and remapping options, making it a powerful tool for DBAs handling large-scale Oracle environments. Oracle Data Pump supports a variety of export and import modes: Full database Specific schemas Individual tables On the database server, if OS authentication is properly configured you can issue expdp \"/ as sysdba\" and Data Pump will not require you to enter the SYS password, it connects via OS authentication. Export Process Before taking the export create a directory in the database with the path ...

Steps to do after provisioning a VM to enable connectivity to the internet and assign an IP address --OLD OS RELEASES-- Edit the following file: /etc/sysconfig/network-scripts/ifcfg-ens192 vi /etc/sysconfig/network-scripts/ifcfg-ens192 TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=static #Changed from dhcp to static or none DEFROUTE=yes IPV4_FAILURE_FATAL=no IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_FAILURE_FATAL=no IPV6_ADDR_GEN_MODE=stable-privacy NAME=ens192 UUID=590dc84a-35ac-40bd-a3d9-0e62950e5018 DEVICE=ens192 ONBOOT=yes #Changed from no to yes IPADDR=172.16.1.17 #Add IP address NETMASK=255.255.255.0 #Add netmask GATEWAY=172.16.1.254 #Add gateway DNS1=8.8.8.8 #Add DNS entry 1 (max 3) DNS2=8.8.8.4 # Add DNS entry 2 [root@slr-app-server network-scripts]# Restart network: systemctl restart network Set the hostname of the server: hostnamectl set-hostname slr-app-server Check ping connectivity: ping 8.8.8.8 Reboot the server to confirm that post-provisioning st...