oracle表空间

1.查看表空间的使用情况

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)",
       SYSDATE
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 4 DESC;
2. 建立表空间
CREATE TABLESPACE data01 DATAFILE '/oracle/oradata/db/DATA01.dbf' SIZE 500M; 

3.删除表空间
DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES; 

4. 修改表空间大小
alter database datafile '/path/NADDate05.dbf' resize 100M 

5.增加表空间 
ALTER TABLESPACE NEWCCS ADD DATAFILE '/u03/oradata/newccs/newccs04.dbf' SIZE 4896M;

6. 查询数据库现在的表空间
select tablespace_name, file_name, sum(bytes)/1024/1024 table_size from dba_data_files group by tablespace_name,file_name;