oracle表空间使用率统计查询

参考文献

文献1：http://blog.itpub.net/24104518/viewspace-730682，字符有格式，需要清理一下

文献2：http://www.cnblogs.com/fengyun627/archive/2009/07/27/1532551.html

文献3：http://blog.csdn.net/hproc/article/details/7372265

sql语句格式化：http://web.chacuo.net/formatsql

参考1

--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_BYTES
        FROM   SYS.DBA_FREE_SPACE
        GROUP  BY TABLESPACE_NAME) F,(SELECT DD.TABLESPACE_NAME,Round(Sum(DD.BYTES) / ( 1024 * 1024 ),2) TOT_GROOTTE_MB
        FROM   SYS.DBA_DATA_FILES DD
        GROUP  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 MB
        FROM   dba_free_space
        GROUP  BY tablespace_name) free,(SELECT tablespace_name,Sum(bytes) / 1024 / 1024 AS MB
        FROM   dba_data_files
        GROUP  BY tablespace_name) total
WHERE  free.tablespace_name = total.tablespace_name;

参考2：

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) free
        FROM   DBA_FREE_SPACE
        GROUP  BY tablespace_name) a,Sum(bytes) total
        FROM   DBA_DATA_FILES
        GROUP  BY tablespace_name) b
WHERE  a.tablespace_name = b.tablespace_name

参考3

SELECT TABLESPACE_NAME "表空间",To_char(Round(BYTES / 1024,'99990.00')
       || ''           "实有",To_char(Round(FREE / 1024,'99990.00')
       || 'G'          "现有",To_char(Round(( BYTES - FREE ) / 1024,'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 '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_used
  from (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(2,2) max_gb
          from (select f.tablespace_name,sum(f.bytes) bytes_alloc,sum(decode(f.autoextensible,'YES',f.maxbytes,'NO',f.bytes)) maxbytes
                  from dba_data_files f
                 group by tablespace_name) a,(select f.tablespace_name,sum(f.bytes) bytes_free
                  from dba_free_space f
                 group by tablespace_name) b
         where a.tablespace_name = b.tablespace_name(+)
        union all
        select h.tablespace_name tablespace_name,round(sum(nvl(p.bytes_used,round(sum(decode(f.autoextensible,f.bytes)) / power(2,2) max_gb
          from v$temp_space_header h,v$temp_extent_pool p,dba_temp_files f
         where p.file_id(+) = h.file_id
           and p.tablespace_name(+) = h.tablespace_name
           and f.file_id = h.file_id
           and f.tablespace_name = h.tablespace_name
         group by h.tablespace_name)
order by 4;

（编辑：李大同）

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