How to Change PDB DBID in Oracle Using the Clone Method
In Oracle Multitenant architecture, every Pluggable Database (PDB) has a unique DBID (Database Identifier). Oracle and tools like RMAN use this identifier…
Tag: Database Administration
Resync Oracle Standby DB Without a Full Rebuild
Every DBA managing an Oracle Data Guard setup eventually faces this situation. The standby database has fallen behind the primary, archive logs…
Oracle Recycle Bin: The Complete DBA Guide
Everything you need to know — from concepts to day-to-day commands What Is the Oracle Recycle Bin? Introduced in Oracle 10g, the…
Oracle Transaction Management & Read Consistency
Oracle’s transaction management and read consistency mechanisms are fundamental to maintaining data integrity in multi-user environments. Understanding how Oracle handles concurrent transactions,…
Oracle ROLLBACK Statement: Behind the Scenes
When you execute ROLLBACK;, Oracle discards all uncommitted changes and restores data to its previous state. Understanding ROLLBACK is essential for transaction…
Oracle COMMIT Statement: Behind the Scenes
When you execute COMMIT;, Oracle makes all your DML changes permanent. This seemingly simple statement triggers a complex series of operations involving…
Oracle DELETE Statement: Behind the Scenes
When you execute DELETE FROM employees WHERE employee_id = 101;, Oracle performs a complex series of operations involving row location, undo generation,…
Oracle UPDATE Statement: Behind the Scenes
When you execute UPDATE employees SET salary = 60000 WHERE employee_id = 101;, Oracle performs a sophisticated series of operations involving undo…
Oracle INSERT Statement: Behind the Scenes
When you execute a simple INSERT INTO employees VALUES (101, 'John', 'Doe', 50000); statement, Oracle performs a complex series of operations involving…
Oracle SELECT Statement: Behind the Scenes
When you execute a simple SELECT * FROM employees WHERE department_id = 10; query, have you ever wondered what happens behind the…
