--查询表空间使用情况
SELECT Upper(F.TABLESPACE_NAME)         "表空间名",D.TOT_GROOTTE_MB                 "表空间大小(M)",D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",To_char(Round(( D.TOT_GROOTTE_MB - F.TOTAL_BYTES ) / D.TOT_GROOTTE_MB * 100, 2), '990.99')|| '%'                           "使用比",F.TOTAL_BYTES                    "空闲空间(M)",F.MAX_BYTES                      "最大块(M)"
FROM   (SELECT TABLESPACE_NAME,Round(Sum(BYTES) / ( 1024 * 1024 ), 2) TOTAL_BYTES,Round(Max(BYTES) / ( 1024 * 1024 ), 2) MAX_BYTESFROM   SYS.DBA_FREE_SPACEGROUP  BY TABLESPACE_NAME) F,(SELECT DD.TABLESPACE_NAME,Round(Sum(DD.BYTES) / ( 1024 * 1024 ), 2) TOT_GROOTTE_MBFROM   SYS.DBA_DATA_FILES DDGROUP  BY DD.TABLESPACE_NAME) D
WHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAME
ORDER  BY 1--查询表空间的free space
select tablespace_name, count(*) AS extends,round(sum(bytes) / 1024 / 1024, 2) AS MB,sum(blocks) AS blocks from dba_free_space group BY tablespace_name;--查询表空间的总容量
select tablespace_name, sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name;
--查询表空间使用率
SELECT total.tablespace_name,Round(total.MB, 2)           AS Total_MB,Round(total.MB - free.MB, 2) AS Used_MB,Round(( 1 - free.MB / total.MB ) * 100, 2)|| '%'                       AS Used_Pct
FROM   (SELECT tablespace_name,Sum(bytes) / 1024 / 1024 AS MBFROM   dba_free_spaceGROUP  BY tablespace_name) free,(SELECT tablespace_name,Sum(bytes) / 1024 / 1024 AS MBFROM   dba_data_filesGROUP  BY tablespace_name) total
WHERE  free.tablespace_name = total.tablespace_name;

SELECT a.tablespace_name                        "表空间名",total                                    "表空间大小",free                                     "表空间剩余大小",( total - free )                         "表空间使用大小",Round(( total - free ) / total, 4) * 100 "使用率   %"
FROM   (SELECT tablespace_name,Sum(bytes) freeFROM   DBA_FREE_SPACEGROUP  BY tablespace_name) a,(SELECT tablespace_name,Sum(bytes) totalFROM   DBA_DATA_FILESGROUP  BY tablespace_name) b
WHERE  a.tablespace_name = b.tablespace_name

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 )) USEDFROM   (SELECT TABLESPACE_NAME TABLESPACE_NAME,Sum(BYTES)      BYTESFROM   DBA_DATA_FILESGROUP  BY TABLESPACE_NAME) A,(SELECT TABLESPACE_NAME TABLESPACE_NAME,Sum(BYTES)      FREEFROM   DBA_FREE_SPACEGROUP  BY TABLESPACE_NAME) BWHERE  A.TABLESPACE_NAME = B.TABLESPACE_NAME)
--WHERE TABLESPACE_NAME LIKE 'CDR%' --这一句用于指定表空间名称
ORDER  BY Floor(10000 * USED / BYTES) DESC;

select tablespace_name,max_gb,used_gb,round(100 * used_gb / max_gb) pct_usedfrom (select a.tablespace_name tablespace_name,round((a.bytes_alloc - nvl(b.bytes_free, 0)) / power(2, 30),2) used_gb,round(a.maxbytes / power(2, 30), 2) max_gbfrom (select f.tablespace_name,sum(f.bytes) bytes_alloc,sum(decode(f.autoextensible,'YES',f.maxbytes,'NO',f.bytes)) maxbytesfrom dba_data_files fgroup by tablespace_name) a,(select f.tablespace_name, sum(f.bytes) bytes_freefrom dba_free_space fgroup by tablespace_name) bwhere a.tablespace_name = b.tablespace_name(+)union allselect h.tablespace_name tablespace_name,round(sum(nvl(p.bytes_used, 0)) / power(2, 30), 2) used_gb,round(sum(decode(f.autoextensible,'YES',f.maxbytes,'NO',f.bytes)) / power(2, 30),2) max_gbfrom v$temp_space_header h, v$temp_extent_pool p, dba_temp_files fwhere p.file_id(+) = h.file_idand p.tablespace_name(+) = h.tablespace_nameand f.file_id = h.file_idand f.tablespace_name = h.tablespace_namegroup by h.tablespace_name)
order by 4;