运维工程师常用的Oracle经典语句——5.Oracle表空间创建、修改以及查看表空间使用情况

查看Oracle用户表所使用的空间信息

SELECT *
  FROM (SELECT USERNAME, DEFAULT_TABLESPACE, TEMPORARY_TABLESPACE
          FROM dba_users
        UNION ALL
        SELECT USERNAME, DEFAULT_TABLESPACE, TEMPORARY_TABLESPACE
          FROM user_users) t1
 WHERE T1.USERNAME IN
       ('用户名1'，‘用户名2’);

查看Oralce表空间数据文件存放位置

SELECT FILE_NAME, TABLESPACE_NAME FROM DBA_DATA_FILES;

给Oracle用户增加或修改表空间

SELECT file_name, tablespace_name, bytes / (1024 * 1024) M
  FROM dba_data_files;
-- 修改表空间数据文件的大小
ALTER database datafile '/u01/app/oracle/product/10.1/dbs/users01.dbf' RESIZE 32M;
-- 在表空间新增加数据文件
ALTER TABLESPACE users ADD DATAFILE '/oralcda/u03/app/oracle/oradata/prod/users02.dbf' SIZE 10M;
-- 重新查询
SELECT file_name, tablespace_name, bytes / (1024 * 1024) M
  FROM dba_data_files;

创建表空间以及临时表空间并给Oracle用户指定表空间

-- 创建临时表空间
CREATE TEMPORARY TABLESPACE DB_TEMP
         TEMPFILE 'D:appAdministratororadataNewDBDB_TEMP.DBF'
         SIZE 32M
         AUTOEXTEND ON
         NEXT 32M MASIZE UNLIMITED
         EXTENT MANAGEMENT LOCAL;
-- 创建永久表空间
CREATE TABLESPACE DB_DATA
         LOGGING
         DATAFILE 'D:appAdministratororadataNewDBDB_DATA.DBF'
         SIZE 32M
         AUTOEXTEND ON
         NEXT 32M MAXSIZE UNLIMITED
         EXTENT MANAGEMENT LOCAL;
#其中'DB_DATA'和'DB_TEMP'是你自定义的数据表空间名称和临时表空间名称，可以任意取

-- 创建用户并指定表空间
CREATE USER NEWUSER IDENTIFIED BY BD123
         ACCOUNT UNLOCK
         DEFAULT TABLESPACE DB_DATA
         TEMPORARY TABLESPACE DB_TEMP;
#默认表空间'DEFAULT TABLESPACE'使用上面创建的表空间名：DB_DATA。
#临时表空间'TEMPORARY TABLESPACE'使用上面创建的临时表空间名:DB_TEMP。

给已经创建好的用户指定表空间：

#默认表空间
alter user username  default tablespace DB_DATA;
#临时表空间
alter user username  TEMPORARY tablespace DB_TEMP;

Oracle表空间使用率统计查询

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;

上述语句查询结果如下图所示：
在这里插入图片描述
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,
       (SELECT tablespace_name,
               Sum(bytes) total
        FROM   DBA_DATA_FILES
        GROUP  BY tablespace_name) b
WHERE  a.tablespace_name = b.tablespace_name

查询结果
在这里插入图片描述
参考3

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 'CDR%' --这一句用于指定表空间名称
ORDER  BY Floor(10000 * USED / BYTES) DESC;

查询结果
在这里插入图片描述

运维工程师常用的Oracle经典语句——5.Oracle表空间创建、修改以及查看表空间使用情况

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