After the installation of Oracle, the default client is Sqlplus, and a company commonly used plsqldeveloper client software, and Navicat Primie This can connect MySQL, SQL Server, Oracle series database
When you install Oracle, the default password is as follows if you do not reset the password for the following users:
Username/Password Login ID description
Sys/change_on_install SYSDBA or Sysoper cannot log on as NORMAL and can be used as the default system administrator
System/manager SYSDBA or NORMAL cannot log on as Sysoper and can be used as the default system administrator
Sysman/oem_temp Sysman user name for OMS
Scott/tiger Normal Normal User
Aqadm/aqadm SYSDBA or NORMAL Advanced Queue Administrator
Dbsnmp/dbsnmp SYSDBA or NORMAL replication administrator
Login identity: Refers to the role roles specified at login, oracle11g sysdba and default two.
When you enter a user name and password in Sqlplus, you must enter as SYSDBA before entering the user name and password, or you will get an error.
Oralce Client-side Sqlplus