Oracle database modifies user name password

Win+r Open the Run window, enter cmd into the command line: Enter the Sqlplus, enter the username, enter the password (if it is Super admin sys, add as as SYSDBA after the password) and enter the SQL command line; When the connection succeeds, type select username from     Dba_users "View the list of users. If you modify a user password, modify the user password format:

Alter user username identified by new password;

Take apps as an example, the password is modified to 123456. Can be entered

Alter user apps identified by 123456; So the modification succeeded.