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…