在10g以前是沒有這個功能的，刪除后就沒有了，只能從備份恢復。

＃將執行的操作記錄在文件中，就是屏幕輸出的內容
SQL>spool '/home/oracle/drop.txt'


＃＃刪除 emp表?
SQL> drop table emp ;

Table dropped.

＃現在查看emp已經不存在了
SQL> select * from emp ;
select * from emp?
????????????? *
ERROR at line 1:
ORA-00942: table or view does not exist?

＃查看回收站的內容
SQL> show recyclebin
ORIGINAL NAME??? RECYCLEBIN NAME??????????????? OBJECT TYPE? DROP TIME???????? ?
---------------- ------------------------------ ------------ -------------------
EMP????????????? BIN$sGRMOtFvhCPgQKjABwAOsw==$0 TABLE??????? 2011-10-29:06:20:34

＃查看用戶回收站的內容
SQL> select * from user_recyclebin
? 2? ;

OBJECT_NAME??????????????????? ORIGINAL_NAME??????????????????? OPERATION????? ?
------------------------------ -------------------------------- ---------????? ?
TYPE????????????????????? TS_NAME??????????????????????? CREATETIME??????????? ?
------------------------- ------------------------------ -------------------?? ?
DROPTIME?????????????? DROPSCN PARTITION_NAME?????????????????? CAN CAN??????? ?
------------------- ---------- -------------------------------- --- ---??????? ?
?? RELATED BASE_OBJECT PURGE_OBJECT????? SPACE???????????????????????????????? ?
---------- ----------- ------------ ----------???????????????????????????????? ?
BIN$sGRMOtFvhCPgQKjABwAOsw==$0 EMP????????????????????????????? DROP?????????? ?
TABLE???????????????????? USERS????????????????????????? 2005-06-30:19:47:57?? ?
2011-10-29:06:20:34???? 517667????????????????????????????????? YES YES??????? ?
???? 51148?????? 51148??????? 51148????????? 8???????????????????????????????? ?
?????????????????????????????????????????????????????????????????????????????? ?

OBJECT_NAME??????????????????? ORIGINAL_NAME??????????????????? OPERATION???????
------------------------------ -------------------------------- ---------???????
TYPE????????????????????? TS_NAME??????????????????????? CREATETIME?????????????
------------------------- ------------------------------ -------------------????
DROPTIME?????????????? DROPSCN PARTITION_NAME?????????????????? CAN CAN?????????
------------------- ---------- -------------------------------- --- ---?????????
?? RELATED BASE_OBJECT PURGE_OBJECT????? SPACE??????????????????????????????????
---------- ----------- ------------ ----------??????????????????????????????????
BIN$sGRMOtFuhCPgQKjABwAOsw==$0 PK_EMP?????????????????????????? DROP????????????
INDEX???????????????????? USERS????????????????????????? 2005-06-30:19:47:57????
2011-10-29:06:20:34???? 517663????????????????????????????????? NO? YES?????????
???? 51148?????? 51148??????? 51149????????? 8??????????????????????????????????
????????????????????????????????????????????????????????????????????????????????
將回收站的表恢復出來
SQL> flashback table emp to before drop ;

Flashback complete.

再看回收站就沒有東西了
SQL> show recyclebin

emp現在又可以用了
SQL> select * from emp where sal > 3000;

???? EMPNO ENAME????? JOB????????????? MGR HIREDATE???????? SAL?????? COMM??????
---------- ---------- --------- ---------- --------- ---------- ----------??????
??? DEPTNO??????????????????????????????????????????????????????????????????????
----------??????????????????????????????????????????????????????????????????????
????? 7839 KING?????? PRESIDENT??????????? 17-NOV-81?????? 5000?????????????????
??????? 10??????????????????????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????????????????????

SQL> spool off
[root@bogon oracle]#?

相關知識點：
1、從回收站恢復時重命名表
SQL> flashback table t2 to before drop rename to t4 ;

2、刪除回收站指定的表
SQL> purge table t4;

3、清空回收站
SQL> purge recyclebin

4、刪除表時不經過回收站直接刪除

SQL> drop table t3 purge ;

本文轉自zhaoyun00 51CTO博客，原文鏈接:http://blog.51cto.com/zhaoyun/700567

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