This tool enables you to perform the same database management operations, and query, insert, update, or delete data directly in the database.

To start SQL*Plus, from the Start menu, select All Programs, then Oracle - HOMENAME, then Application Development, and then SQL Plus.

Alternatively, at the command line, you can enter the following command at a Windows command prompt:

C:\> sqlplus /nolog
SQL> CONNECT user_name
Enter password: password 

For example, to log on as SYSTEM using the password password, you enter:

C:\> sqlplus /nolog
SQL> CONNECT SYSTEM
Enter password: password

If you are logging on as SYS, you must connect as SYSDBA:

C:\> sqlplus /nolog
SQL> CONNECT SYS AS SYSDBA
Enter password: password