Oracle系列---【表空间常用命令】

1.创建表空间

#创建大小为30G且开启自增的表空间
CREATE TABLESPACE TEST_COM_SMM_FRONT DATAFILE '/oradata/ORA19/datafile/TEST_COM_SMM_FRONT_01.dbf' SIZE 30024M AUTOEXTEND ON;

2.查看表空间使用情况

#表空间数据文件维度使用率查询
SELECT 
    b.TABLESPACE_NAME,
    b.FILE_NAME,
    SUBSTR(b.BYTES/1024/1024/1024,1,5) 总大小G,
    SUBSTR(b.BYTES-SUM(NVL(a.BYTES,0)))/1024/1024/1024,1,5) 已使用G,
    SUBSTR(b.BYTES-SUM(NVL(a.BYTES,0)))/b.BYTES*100,1,5) 使用率
FROM
    SYS.DBA_FREE_SPACE a
INNER JOIN
    SYS.DBA_DATA_FILES b
ON 
    a.FILE_ID = b.FILE_ID
GROUP BY 
    b.TABLESPACE_NAME,b.FILE_NAME,b.BYTES
ORDER BY SUBSTR((b.BYTES-SUM(NVL(a.BYTES,0)))/b.BYTES*100,1,5) DESC;

#表空间维度
SELECT 
    b.TABLESPACE_NAME,
    SUBSTR(b.BYTES/1024/1024/1024,1,5) 总大小G,
    SUBSTR((b.BYTES-SUM(NVL(a.BYTES,0)))/1024/1024/1024,1,5) 已使用G,
    SUBSTR((b.BYTES-SUM(NVL(a.BYTES,0)))/b.BYTES*100,1,5) 使用率
FROM
    SYS.DBA_FREE_SPACE a
INNER JOIN
    SYS.DBA_DATA_FILES b
ON 
    a.FILE_ID = b.FILE_ID
GROUP BY
    SUBSTR((b.BYTES-SUM(NVL(a.BYTES,0)))/b.BYTES*100,1,5) DESC;

3.表空间新增数据文件

ALTER tablespace TEST_COM_SC
ADD DATAFILE '/oradata/ORA19/datafile/TEST_COM_SMM_FRONT_02.dbf'
SIZE 20480M
AUTOEXTEND ON NEXT 5000M;

ALTER DATABASE DATAFILE '/oradata/ORA19/datafile/TEST_COM_SMM_FRONT_01.dbf'
AUTOEXTEND ON NEXT 500M;

4.用户表空间查询

SELECT 
    DISTINCT a.TABLESPACE_NAME
FROM 
    DBA_TABLES a
LEFT JOIN DBA_TABLESPACES b ON
    a.TABLESPACE_NAME = b.TABLESPACE_NAME
WHERE
    OWNER LIKE 'TEST_%';

5.关闭表空间自增

#查看已开启自增的表空间
SELECT FILE_NAME,
       TABLESPACE_NAME,
       AUTOEXTENSIBLE,
       'ALTER DATABASE DATAFILE '''||FILE_NAME||''' AUTOEXTEND OFF;',
FROM DBA_DATA_FILES
WHERE
       AUTOEXTENSIBLE ='YES'
       AND TABLESPACE_NAME LIKE 'TEST%';

#关闭表空间自增
ALTER DATABASE DATAFILE '/oradata/ORA19/datafile/TEST_COM_SMM_FRONT_01.dbf' AUTOEXTEND OFF;

6.删除oracle用户

DROP USER YOUR_USERNAME CASCADE;
ALTER TABLESPACE YOUR_TABLESPACE_NAME SHRINK SPACE;

7.修改表中表分区的表空间

ALTER TABLE `TEST_NEW_DS.BANK_OPER` MOVE PARTITION `SYS_P1706` TABLESPACE `TEST_NEW_DS`;