sys@LS1>create user user1 identified by user1;
User created.
sys@LS1>grant dba to user1;
Grant succeeded.
sys@LS1>create user user2 identified by user2;
User created.
sys@LS1>grant dba to user2;
User created.
sys@LS1>grant dba to user1;
Grant succeeded.
sys@LS1>create user user2 identified by user2;
User created.
sys@LS1>grant dba to user2;
Grant succeeded.
sys@LS1>conn user1
Enter password:
Connected.
user1@LS1>create table tb1_user1 (id number);
Table created.
user1@LS1>conn user2
Enter password:
Connected.
user2@LS1>create table tb1_user2 (id number);
user2@LS1>insert into tb1_user2 values (1);
1 row created.
user2@LS1>commit;
Commit complet