권한 확인
SELECT *
  FROM USER_TAB_PRIVS;
  
 비밀번호 강제 변경 
 sqlplus "/as sysdba"

ALTER USER 아이디 IDENTIFIED BY 암호;

SELECT A.SESSION_ID SID,
B.SERIAL# SERIAL_NO,
A.OS_USER_NAME OS_USER_NAME,
A.ORACLE_USERNAME ORACLE_USERNAME,
B.STATUS STATUS
FROM V$LOCKED_OBJECT A, V$SESSION B
WHERE A.SESSION_ID = B.SID;

SELECT *
  FROM V$LOCKED_OBJECT;

ALTER SYSTEM KILL SESSION 'SID, SERIAL_ID';

※DBA_FREE_SPACE, DBA_DATA_FILES 데이터 사전 

SELECT b.file_name "FILE_NAME", -- DataFile Name 
       b.tablespace_name "TABLESPACE_NAME", -- TableSpace Name 
       b.bytes / 1024 "TOTAL SIZE(KB)", -- 총 Bytes 
       ((b.bytes - sum(nvl(a.bytes,0)))) / 1024 "USED(KB)", -- 사용한 용량 
       (sum(nvl(a.bytes,0))) / 1024 "FREE SIZE(KB)", -- 남은 용량 
       ROUND((sum(nvl(a.bytes,0)) / (b.bytes)) * 100, 2) "FREE %" -- 남은 % 
  FROM DBA_FREE_SPACE a, DBA_DATA_FILES b 
WHERE a.file_id(+) = b.file_id 
GROUP BY b.tablespace_name, b.file_name, b.bytes ORDER BY b.tablespace_name