SQLPlus Connect As Sysdba

Connect As Sysdba Syntax:
CONNECT “username/[email protected]_string AS SYSDBA”
CONNECT / AS SYSDBA

Starting SQL*Plus:
SQLPLUS [option] “username/[email protected]_string AS SYSDBA” []

Examples:

SQL> sqlplus
SQL> connect “system/user”
SQL> sqlplus “sys/user AS SYSDBA”