SQL> select * from v$version; BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod PL/SQL Release 10.2.0.1.0 - Production CORE 10.2.0.1.0 Production TNS for Linux: Version 10.2.0.1.0 - Production NLSRTL Version 10.2.0.1.0 - Production |
向USERS表空間增加一個數據文件：
SQL> alter tablespace users add datafile '/opt/oracle/oradata/eygle/users02.dbf' size 10M; Tablespace altered. SQL> select file#,name from v$datafile; FILE# NAME ---------- -------------------------------------------------- 1 /opt/oracle/oradata/eygle/system01.dbf 2 /opt/oracle/oradata/eygle/undotbs01.dbf 3 /opt/oracle/oradata/eygle/sysaux01.dbf 4 /opt/oracle/oradata/eygle/users01.dbf 5 /opt/oracle/oradata/eygle/users02.dbf 5 rows selected. |
確認表空間文件信息：
SQL> select file_name,file_id from dba_data_files where tablespace_name='USERS'; FILE_NAME FILE_ID -------------------------------------------------- ---------- /opt/oracle/oradata/eygle/users02.dbf 5 /opt/oracle/oradata/eygle/users01.dbf 4 |
SQL> select segment_name,file_id,blocks from dba_extents where file_id=5; no rows selected |
刪除表空間中的空數據文件：
SQL> alter tablespace users drop datafile '/opt/oracle/oradata/eygle/users02.dbf'; Tablespace altered. |
檢查數據字典，這個空文件的信息已經被徹底清除了：
SQL> select file_name,file_id from dba_data_files where tablespace_name='USERS'; FILE_NAME FILE_ID -------------------------------------------------- ---------- /opt/oracle/oradata/eygle/users01.dbf 4 |
