[root@localhost ~]# su - oracle
[oracle@localhost ~]$ sqlplus "/as sysdba"
SQL> SELECT TABLESPACE_NAME "表空间",
To_char(Round(BYTES / 1024, 2), '99990.00')
|| '' "实有",
To_char(Round(FREE / 1024, 2), '99990.00')
|| 'G' "现有",
To_char(Round(( BYTES - FREE ) / 1024, 2), '99990.00')
|| 'G' "使用",
To_char(Round(10000 * USED / BYTES) / 100, '99990.00')
|| '%' "比例"
FROM (SELECT A.TABLESPACE_NAME TABLESPACE_NAME,
Floor(A.BYTES / ( 1024 * 1024 )) BYTES,
Floor(B.FREE / ( 1024 * 1024 )) FREE,
Floor(( A.BYTES - B.FREE ) / ( 1024 * 1024 )) USED
FROM (SELECT TABLESPACE_NAME TABLESPACE_NAME,
Sum(BYTES) BYTES
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME) A,
(SELECT TABLESPACE_NAME TABLESPACE_NAME,
Sum(BYTES) FREE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) B
WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME)
--WHERE TABLESPACE_NAME LIKE 'SYS%' --这一句用于指定表空间名称
ORDER BY Floor(10000 * USED / BYTES) DESC;
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二、表空间文件使用信息
SQL> select mAX(B.file_id) id,
B.TABLESPACE_NAME 表空间,
B.FILE_NAME 物理文件名,
B.BYTES / 1024 / 1024 大小M,
(B.BYTES - SUM(NVL(A.BYTES, 0))) / 1024 / 1024 已使用M,
SUBSTR((B.BYTES - SUM(NVL(A.BYTES, 0))) / (B.BYTES) * 100, 1, 5) 利用率
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;
三、查看用户表空间信息
注意:用户名称一定大写
SQL> select username,default_tablespace from dba_users where username='SYSTEM';
USERNAME DEFAULT_TABLESPACE
------------------------------ ------------------------------
SYSTEM SYSTEM
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