Oracle SQL*Plus Connection Methods: OS Authentication & Easy Connect Plus

Описание: This video covers Oracle Database connection methods in Oracle 19c using SQL*Plus.

Learn the two essential ways to connect to an Oracle database from the command line — OS Authentication and Easy Connect Plus — and understand exactly when to use each one.

What you will learn:
OS Authentication (sqlplus / as sysdba) — how it works, why no password is needed, and why it bypasses the Oracle Listener entirely
Easy Connect Plus — the Oracle 19c syntax for connecting to a Pluggable Database without a tnsnames.ora file
The critical difference between the two methods: OS Authentication works even when the database is shut down; Easy Connect Plus requires the Listener to be running
Linux vs Windows OS group requirements: dba group on Linux, ORA_DBA on Windows
Optional parameters — when to omit port (defaults to 1521) and service name
How to disconnect cleanly using the exit command

This is a must-know topic for any Oracle DBA working with CDB and PDB environments. Understanding these connection methods is the foundation for database administration, startup/shutdown procedures, and PDB management.

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