select username,account_status from dba_users; 

select username,account_status from dba_users where account_status='OPEN';

select username,account_status from dba_users t where t.default_tablespace = 'USERS' and t.account_status = 'OPEN';
		

			
SQL> show user;
USER is "SYS"

SQL> select user from dual;

USER
------------------------------
SYS
			
			

用戶預設表空間

			
SQL> SELECT DEFAULT_TABLESPACE FROM DBA_USERS WHERE USERNAME='WCUSER';

DEFAULT_TABLESPACE
------------------------------
WCSDB

SQL> SELECT DEFAULT_TABLESPACE FROM DBA_USERS WHERE USERNAME=(select user from dual);

DEFAULT_TABLESPACE
------------------------------
SYSTEM


SQL> select username,account_status from dba_users t where t.default_tablespace = 'USERS' and t.account_status = 'OPEN';

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
FINANCE                        OPEN
NEWS                           OPEN
			
			

帳號加鎖與解鎖

alter user scott account unlock /lock;

			
SQL> alter user scott account unlock;

User altered.
SQL> select username,account_status from dba_users where username='SCOTT';

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
SCOTT                          EXPIRED

SQL> alter user scott account lock;

User altered.

SQL> select username,account_status from dba_users where username='SCOTT';

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
SCOTT                          EXPIRED & LOCKED

SQL>