Oracle Database installation process is cumbersome, and uninstall more cumbersome, if the uninstallation is not clean, the next time you install Oracle will not succeed. Here's a way to remotely connect an Oracle database using the PLSQL Developer tool without having to install an Oracle client.
First you need to download this software on the Oracle official website: INSTANTCLIENT-BASIC-WIN32. Then unzip, open this file, create a new file inside: Network, create a new folder in the network: admin, create a new file in admin: Tnsnames.ora. The remote configuration of the database in Tnsnames.ora is mainly about configuring the remote computer you are accessing, as follows: ORCL = (DESCRIPTION = (Address_list = (ADDRESS = (PROTOCOL = TCP) (HOST = 192.168.1.101) (PORT = 1521))) (Connect_data = (service_name = ORCL))) is saved after the configuration is complete. Then add the environment variable: The new variable name is: Tns_admin, the new variable value is storedInstantclient-basic-win32 path, such as: C:\DEV_Soft\instantclient_11_2Finally inchange some configurations in Plsql Developer (can be opened again without logging in plsql Developer): tools-preferences-oracle-connection: Oracle Home is set to Instantclient-basic-win32 's storage path, such as: C:\DEV_Soft\instantclient_11_2, set the Oracle library to oci.dll files under Instantclient-basic-win32, for example: C:\DEV_Soft\instantclient_11_2\oci.dll Here, the configuration is complete and you can open theplsql Developer entered the username and password, and entered the name of the remote database configured in Tnsnames.ora in database (ORCL).
Plsql Developer Tool Remote connection to Oracle database method