flashback drop误删除的表后的恢复及对回收站中表的操作
1.误删除表，使用flashback drop功能找回
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
TEST TABLE
SQL> select * from test;
A
----------
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0.
SQL> show parameter recyclebin; -验证回收站是否打开--如未打开不能使用闪回DROP--11G默认打开
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
recyclebin string on
SQL> show recyclebin;
SQL> drop table test;
Table dropped.
查询回收站，删除的表在里面，并被
系统自己命令--BIN$开头一长串---从ORIGINAL NAME 列可以看到表的原名是test
SQL> show recyclebin;
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
TEST BIN$387tHPzSqO/gQKjA3QEnzg==$0 TABLE 2013-06-23:17:29:01
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
BIN$387tHPzSqO/gQKjA3QEnzg==$0 TABLE
使用回收站中的BIN$的表名也能查询到表中数据
SQL> select * from "BIN$387tHPzSqO/gQKjA3QEnzg==$0";
A
----------
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0
执行闪回删除表的命令并查询数据是否完整：
SQL> flashback table test to before drop;
Flashback complete.
SQL> select * from "BIN$387tHPzSqO/gQKjA3QEnzg==$0";
select * from "BIN$387tHPzSqO/gQKjA3QEnzg==$0"
*
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
TEST TABLE
SQL> select * from test;
A
----------
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0
2.闪回删除并将表重命名
BYS@bys1>select * from test5;
ID NAME
---------- ----------
2 b
BYS@bys1>drop table test5;
Table dropped.
BYS@bys1>flashback table test5 to before drop rename to test6;
Flashback complete.
BYS@bys1>select * from test6;
ID NAME
---------- ----------
2 b
3.回收站内查看删除的表，单个删除回收站里的表、全部清空回收站。
SQL> create table test2 as select * fromtest1;
表已创建。
SQL> insert into test2values('00002','baishan2');
已创建 1 行。
SQL> select * from test2;
ID NAME
----- ----------
00001 baishan
00002 baishan2
SQL> show recyclebin
SQL> drop table test1;
表已删除。
删除表后查看回收站里，可以看到删除的表名，及删除时间
SQL> showrecyclebin
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------------------------------------- ------------ -------------------
TEST1 BIN$kUfBJ3qcTSiLxqU6hmoEcw==$0TABLE 2013-02-10:12:17:11
SQL> select * from cat;
TABLE_NAME TABLE_TYPE
------------------------------ -----------
BIN$kUfBJ3qcTSiLxqU6hmoEcw==$0 TABLE
TEST TABLE
TEST2 TABLE
SQL> create table test3 as select * fromtest2;
表已创建。
SQL> select * from cat;
TABLE_NAME TABLE_TYPE
------------------------------ -----------
BIN$kUfBJ3qcTSiLxqU6hmoEcw==$0 TABLE
TEST TABLE
TEST2 TABL