How to Fix ORA-00059: Maximum Number of DB_FILES Exceeded in Oracle
If you’re working with Oracle databases and hit this error: Don’t worry — this just means your database has reached its configured…
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How to Fix ORA-00959: Tablespace ‘TEST_TBS’ Does Not Exist
If you’re working with Oracle and see this error: It means you’re trying to use a tablespace that hasn’t been created in…
How to Fix ORA-39142: Incompatible Dump File Version in impdp
While working with Oracle Data Pump (expdp/impdp) to export and import data between different database versions, you may encounter this error during…
How to Delete Multiple Lines in vi Editor
When you’re editing a file in vi (or vim) and come across a large block of unnecessary lines—such as logs, commented code,…
How to Fix “ORA-28011: the account will expire soon; change your password now”
If you’ve logged into your Oracle database and seen this message: don’t panic. It’s not an error that stops you from working—it’s…
How to Fix ORA-31696 When Using DIRECT_PATH Import in Oracle Data Pump
When performing a schema or table import using Oracle Data Pump with the DIRECT_PATH method, you might encounter the following error: This…
How to Check If Your Oracle Database Is Multitenant (CDB or non-CDB)
Oracle introduced the Multitenant Architecture starting in version 12c. This allows multiple Pluggable Databases (PDBs) to exist inside a single Container Database…
Automate ORACLE_HOME and Oracle Inventory Backup (with One-Click Restore) Before Patching
Patching Oracle? Smart move — but never patch without a full backup of ORACLE_HOME and Oracle Inventory. If anything breaks during patching,…
How to Backup Oracle oratab, .bash_profile, and Environment Variables
Before performing system-level or Oracle patching activities, it’s a best practice to back up not only your Oracle binaries and inventory but…
How to Backup and Restore ORACLE_HOME Binaries and Oracle Inventory Before Patching
Backing up your Oracle software environment — including the software binaries (ORACLE_HOME) and inventory metadata (oraInventory) — is a critical safety step…
Why Fast Queries Suddenly Slow Down — And What Causes Execution Plan Changes in Oracle
Have you ever run a SQL query that used to be lightning-fast… and now it crawls? The likely culprit? The Execution Plan…
How to Open the Standby Database When the Primary Is Lost
In critical scenarios where the Primary Oracle Database is lost or unrecoverable, and only the Standby Database remains, we must convert the…
How to Perform Tablespace-Level Export/Import Between Two Oracle Databases
🔹 Step 1: Create OS-Level Directories (Source & Target) On Source Server (192.168.10.165) sudo mkdir -p /u02/dpdump/practicesudo chown oracle:oinstall /u02/dpdump/practicesudo chmod 777…
How to Perform Tablespace-Level Export/Import Within the Same Oracle Database
Migrating a tablespace within the same Oracle DB instance can be useful for backup testing, development scenarios, or cloning environments. This step-by-step…
Test Network Latency Using ping -c 900 Command
The ping command is a go-to tool for checking network connectivity. When combined with the -c option, it becomes a great way…