原文： http://space.itpub.net/40239/viewspace-365948

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OMF和非OMF管理的數據文件在DROP TABLESPACE時是否會自動刪除，做了測試：

SQL> alter system set db_create_file_dest='/oradata/data/standby' scope=both;

System altered.

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SQL> show parameter db_create

NAME???????????????????????????????? TYPE??????? VALUE
------------------------------------ ----------- ------------------------------
db_create_file_dest????????????????? string????? /oradata/data/standby
db_create_online_log_dest_1????????? string
db_create_online_log_dest_2????????? string
db_create_online_log_dest_3????????? string
db_create_online_log_dest_4????????? string
db_create_online_log_dest_5????????? string

SQL> create tablespace t3 datafile size 10m;

Tablespace created.

SQL> select * from v$tablespace;

?????? TS# NAME?????????????????????????? INC
---------- ------------------------------ ---
???????? 0 SYSTEM???????????????????????? YES
???????? 1 UNDOTBS1?????????????????????? YES
???????? 2 TEMP?????????????????????????? YES
???????? 3 INDX?????????????????????????? YES
???????? 4 USR??????????????????????????? YES
???????? 5 KONG?????????????????????????? YES
???????? 6 TEST?????????????????????????? YES
???????? 9 T1???????????????????????????? YES
???????? 8 LOGMNRTS?????????????????????? YES
??????? 10 T2???????????????????????????? YES
??????? 11 T3???????????????????????????? YES

11 rows selected.

SQL> select name from v$datafile??where ts# = 11;

NAME
--------------------------------------------------------------------------------
/oradata/data/standby/o1_mf_t3_464smo7s_.dbf

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SQL> create table t100 (id int) tablespace t3;

Table created.

SQL> drop tablespace t3;
drop tablespace t3
*
ERROR at line 1:
ORA-01549: tablespace not empty, use INCLUDING CONTENTS option

SQL> drop tablespace t3 including contents?;

Tablespace dropped.

SQL> !ls -l /oradata/data/standby/o1_mf_t3_464smo7s_.dbf
ls: 0653-341 The file /oradata/data/standby/o1_mf_t3_464smo7s_.dbf does not exist.

看到在DROP TABLESPACE時，就算沒有加上 and datafiles是選項， ORACLE 也會自動刪除數據文件；

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SQL> create tablespace t3 datafile '/oradata/data/standby/data/t3.dbf' size 10m;

Tablespace created.

SQL> create table t100 (a int) tablespace t3;

Table created.

SQL> drop tablespace t3 ;
drop tablespace t3
*
ERROR at line 1:
ORA-01549: tablespace not empty, use INCLUDING CONTENTS option

SQL> drop tablespace t3? including contents;

Tablespace dropped.

SQL> !ls -l /oradata/data/standby/data/t3.dbf
-rw-r-----?? 1 oracle?? dba??????? 10493952 Jun 25 23:42 /oradata/data/standby/data/t3.dbf

沒有加上and datafiles參數時，oracle不會自動刪除datafiles。

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SQL> create tablespace t3 datafile '/oradata/data/standby/data/t4.dbf' size 10m;

Tablespace created.

SQL> create table t100 (a int) tablespace t3;

Table created.

SQL> drop tablespace t3? including contents and datafiles;

Tablespace dropped.

SQL> !ls -l /oradata/data/standby/data/t4.dbf
ls: 0653-341 The file /oradata/data/standby/data/t4.dbf does not exist.

加上and datafiles參數時，oracle會自動刪除datafiles。

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SQL> alter system set db_create_file_dest='' scope=both;

System altered.

SQL> create tablespace t3 datafile '/oradata/data/standby/data/t4.dbf' size 10m;

Tablespace created.

SQL> create table t100 (a int) tablespace t3;

Table created.

SQL> drop tablespace t3? including contents and datafiles;

Tablespace dropped.

SQL> !ls -l /oradata/data/standby/data/t4.dbf
ls: 0653-341 The file /oradata/data/standby/data/t4.dbf does not exist.

SQL>

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SQL code：

--刪除空的表空間，但是不包含物理文件
drop tablespace tablespace_name;

--刪除非空表空間，但是不包含物理文件
drop tablespace tablespace_name including contents;

--刪除空表空間，包含物理文件
drop tablespace tablespace_name including datafiles;

--刪除非空表空間，包含物理文件
drop tablespace tablespace_name including contents and datafiles;

--如果其他表空間中的表有外鍵等約束關聯到了本表空間中的表的字段，就要加上CASCADE CONSTRAINTS
drop tablespace tablespace_name including contents and datafiles CASCADE CONSTRAINTS;

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轉：Oracle:刪除表空間