Oracle从“回收站”恢复删除的表
SQL> column value format a10;
SQL> select value from V$parameter where name = 'recyclebin';
----------
on
or
sql> alter session set recyclebin = on scope=spfile;
or
sql> alter session set recyclebin = off scope=spfile;
2.查看回收站里的内容
SQL> show recyclebin;
or
SQL> select * from user_recyclebin;
下面将创建的表删除后放入回收站
SQL> show user;
USER is "HXL"
SQL> create table test_rbin(val number);
Table created.
SQL> insert into test_rbin(val) values(10);
1 row created.
SQL> commit;
Commit complete.
SQL> drop table test_rbin;
Table dropped.
SQL> show recyclebin;
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
TEST_RBIN BIN$S4u3UNw0QQ6t6LRxMMz7hQ==$0 TABLE 2012-06-22:15:01:30
3.从回收站恢复删除的表
可以使用如下语句从回收站恢复删除的表
sql > flashback table <<table_name>> to before drop;
例如我们恢复刚才删除的表
SQL> flashback table test_rbin to before drop;
Flashback complete.
SQL> select * from test_rbin;
VAL
----------
10
在恢复的过程的同时我们可以将表另外命名,命令如下:
sql>flashback table << dropped table name >> to before drop rename to <<new table name >>;
sql>flashback table test_rbin to before drop rename to test_rbin1;
Oracle从回收站恢复是按照"降序"恢复的,比如连续3次删除同样一个表(删除后再创建,再删除),恢复的是先恢复最后一次删除的表.
SQL> show user;
USER is "HXL"
SQL> drop table test_rbin;
Table dropped.
SQL> create table test_rbin (col1 number);
Table created.
SQL> insert into test_rbin values (1);
1 row created.
SQL> commit;
Commit complete.
SQL> drop table test_rbin;
Table dropped.
SQL> create table test_rbin (col1 number);
Table created.
SQL> insert into test_rbin values (2);
1 row created.
SQL> commit;
Commit complete.
SQL> drop table test_rbin;
Table dropped.
SQL> create table test_rbin (col1 number);
Table created.
SQL> insert into test_rbin values (3);
1 row created.
SQL> commit;
Commit complete.
SQL> drop table test_rbin;
Table dropped.
SQL> show recyclebin;
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
TEST_RBIN BIN$gGHkV/xQSSaQ5bG0PikSAg==$0 TABLE 2012-06-22:15:31:21
TEST_RBIN BIN$xVKygKwJTJa+8zmu4BJzvQ==$0 TABLE 2012-06-22:15:30:53
TEST_RBIN BIN$R7As9PsYRva7CY6cnAjROw==$0 TABLE 2012-06-22:15:30:23
TEST_RBIN BIN$0R+cRKhDTFu+8ShBjLDpqg==$0 TABLE 2012-06-22:15:29:27
SQL> select * from test_rbin1;
COL1
----------
3
SQL> select * from test_rbin2;
COL1
----------
2
SQL> select * from test_rbin3;
COL1
----------
1