flashback drop实验（sys用户的除外，它没有回收站）
发布时间：2020-12-15 17:55:10 所属栏目：百科 来源：网络整理
导读：开启闪回： http://www.voidcn.com/article/p-okbbpchw-bbu.html ? 1、查询原来表的数量 sys@TEST0910 select count(*) from scott.test10; ? ? COUNT(*) ---------- ??????? 14 2、误操作drop sys@TEST0910 drop table scott.test10; ? Table dropped. 3、
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开启闪回：
http://www.voidcn.com/article/p-okbbpchw-bbu.html
?
1、查询原来表的数量
sys@TEST0910> select count(*) from scott.test10;
?
? COUNT(*)
----------
??????? 14
2、误操作drop
sys@TEST0910> drop table scott.test10;
?
Table dropped.
3、登陆scoot用户，查询回收站
sys@TEST0910>
conn scott/tiger
Connected.
?
scott@TEST0910>
show recyclebin
ORIGINAL NAME??? RECYCLEBIN NAME??????????????? OBJECT TYPE? DROP TIME
---------------- ------------------------------ ------------ -------------------
TEST10?????????? BIN$5w/YlwePKa7gQwEAAH+tZw==$0 TABLE??????? 2013-09-23:11:40:56
4、查询回收站里的内容
scott@TEST0910>? select * from
"BIN$5w/YlwePKa7gQwEAAH+tZw==$0";????????????? ------注意：此处是双引号
?
???? EMPNO ENAME????? JOB????????????? MGR HIREDATE???????? SAL?????? COMM???? DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
????? 7369 SMITH????? CLERK?????????? 7902 17-DEC-80??????? 800??????????????????? 20
????? 7499 ALLEN????? SALESMAN??????? 7698 20-FEB-81?????? 1600??????? 300???????? 30
????? 7521 WARD?????? SALESMAN??????? 7698 22-FEB-81?????? 1250??????? 500???????? 30
????? 7566 JONES????? MANAGER???????? 7839 02-APR-81?????? 2975??????????????????? 20
????? 7654 MARTIN???? SALESMAN??????? 7698 28-SEP-81?????? 1250?????? 1400???????? 30
????? 7698 BLAKE????? MANAGER???????? 7839 01-MAY-81?????? 2850??????????????????? 30
????? 7782 CLARK????? MANAGER???????? 7839 09-JUN-81?????? 2450??????????????????? 10
????? 7788 SCOTT????? ANALYST???????? 7566 19-APR-87?????? 3000??????????????????? 20
????? 7839 KING?????? PRESIDENT??????????? 17-NOV-81?????? 5000??????????????????? 10
????? 7844 TURNER???? SALESMAN??????? 7698 08-SEP-81?????? 1500????????? 0???????? 30
????? 7876 ADAMS????? CLERK?????????? 7788 23-MAY-87?????? 1100??????????????????? 20
????? 7900 JAMES????? CLERK?????????? 7698 03-DEC-81??????? 950??????????????????? 30
????? 7902 FORD?????? ANALYST???????? 7566 03-DEC-81?????? 3000??????????????????? 20
????? 7934 MILLER???? CLERK?????????? 7782 23-JAN-82?????? 1300??????????????????? 10
?
14 rows selected.
5、两种闪回方式
使用insert into TEST10 select * from
"BIN$5w/YlwePKa7gQwEAAH+tZw==$0";??闪回
使用flashback table闪回
scott@TEST0910> flashback table TEST10 to before drop
[rename to test11];可以重命名
?
Flashback complete.
?
scott@TEST0910> select count(*) from test10;
?
? COUNT(*)
----------
??????? 14
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