Oracle 11g EX User altered

OPEN CMD PROMPT---- 1. sqlplud 2. sys as sysdba -enter password: no need password 3.show user; 4.select username from all_users; ==ALTER USER=== Syntax: ALTER USER USER_NAME IDENTIFIED BY PASSWORD; EXAMPLE: ALTER USER SYSTEM IDENTIFIEDBY PASS112233; SYNTAX : GRANT DBA TO USERNAME; EXAMPLE : GRANT DBA TO SYSTEM; TRY TO CONNECT AS NEW PASS--