The Oracle database backs up the dmp file, uses the cmd command to import and export steps, and forgets the Oracle password.

Dmp File Import and Export Steps

-- The path of the datafile is provided at will, but the subsequent file name is dbf

LOGGING
DATAFILE 'd: \ OracleDateFile \ DTBS. dbf'
SIZE 32 M
AUTOEXTEND ON
NEXT 32 m maxsize 2048 M
Extent management local;

-- Create a user and specify a tablespace
Create user test identified by "123456" default tablespace DTBS;

Grant connect, resource, dba to test;

Imp user/pw file = file path full = y

-- Delete tables under users and users
Drop user test cascade;

-- Delete tablespaces and physical files
Drop tablespace DTBS including contents and datafiles;

What should I do if I forget my username and password in Oracle?
(1) Open cmd and enter sqlplus/nolog and press Enter;
(2) Enter conn/as sysdba;
(3). alter user system identified by password
(4). exit
(5). log on