SQL*Plus is a tool for interfacing with the Oracle database. : Introduction « SQL PLUS Session Environment « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. SQL PLUS Session Environment
3. Introduction

You can use it to

1. Execute SQL and PL/SQL in the database
2. Update data in your database
3. Perform queries on your data
4. Format the result sets of those queries into reports
5. Create, edit, retrieve, and execute SQL scripts
6. Administer the database