SQLPlus is a command-line interface for interacting with Oracle databases. By default, the up and down arrow keys in SQLPlus are used to navigate through the command history, allowing you to quickly recall and execute previously entered commands.
If the up and down arrow keys are not working as expected in SQL*Plus, you can try the following troubleshooting steps:
Make sure that the terminal emulator that you are using to run SQL*Plus supports the up and down arrow keys. Some terminal emulators may not support these keys or may interpret them differently.
Check if the up and down arrow keys are working in other programs. If the keys are not working in other programs, the problem may be with the terminal emulator or the system configuration.
Check the SQLPlus configuration file for any settings that may be disabling the up and down arrow keys. The SQLPlus configuration file is typically located at "$ORACLE_HOME/sqlplus/admin/glogin.sql". You can search for any settings that may be related to the up and down arrow keys, such as "set term off" or "set sqlprompt".
If the problem persists, you may need to re-install SQLPlus or check for any updates or patches that may be available for your version of SQLPlus.
With these steps, you should be able to troubleshoot and resolve any issues with the up and down arrow keys in SQL*Plus.
Note: SQLPlus is a complex tool with many configuration options and features. Consult the Oracle documentation for more information on SQLPlus and the available options and settings.