范例：

仅启动 SQL*Plus 不登录到数据库

$ sqlplus /nolog

以默认管理员登陆

$ sqlplus / as sysdba

以数据库账户登录

$ sqlplus

$ sqlplus username

$ sqlplus username@sid

$ sqlplus username@//host/sid

$ sqlplus username@//host:port/sid

$ sqlplus username/password

$ sqlplus username/password@sid

$ sqlplus username/password@//host/sid

$ sqlplus username/password@//host:port/sid

$ sqlplus username as sysdba

$ sqlplus username@sid as sysdba

$ sqlplus username@//host/sid as sysdba

$ sqlplus username@//host:port/sid as sysdba

$ sqlplus username/password as sysdba

$ sqlplus username/password@sid as sysdba

$ sqlplus username/password@//host/sid as sysdba

$ sqlplus username/password@//host:port/sid as sysdba

登录数据库并执行 SQL*Plus 脚本文件

$ sqlplus username/password@sid @/home/oracle/createdb

$ sqlplus username/password@sid @/home/oracle/createdb.sql

$ sqlplus username/password@sid @/home/oracle/createdb.sql 10 10 30 40