-- Set the SQL*Plus environment settings
SET ECHO OFF
SET FEEDBACK ON
SET HEADING ON
SET LINESIZE 200
SET PAGESIZE 9999
SET SERVEROUTPUT ON
SET TERMOUT ON
SET TIMING ON
SET VERIFY OFF

-- Set default schema
ALTER SESSION SET CURRENT_SCHEMA=YOUR_SCHEMA_NAME;

-- Define common substitution variables
DEFINE my_variable = 'default_value'

-- Custom SQL*Plus prompt
SET SQLPROMPT "SQL> "

-- Display a welcome message
PROMPT Welcome to SQL*Plus