After installation, the client cannot connect to a database until configured.

(Replace otn with otn-pub for no license page? No – Oracle requires login.)

| Installer Type | Best For | Pros | Cons | | :--- | :--- | :--- | :--- | | | Lightweight apps, immediate connectivity | Tiny download, No installer (zip file), Easy upgrade | Requires manual configuration of environment variables and tnsnames.ora . | | Administrator | DBAs, Full installations | Includes GUI tools (Net Manager), Installer wizards, creates registry keys automatically. | Large download (~2GB+), heavier footprint. |

https://download.oracle.com/otn/nt/oracle19c/190000/WINDOWS.X64_193000_client.zip

MY_DB_CONNECTION = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.100)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = ORCL) ) )