操作笔记:
create table temp_update_doc ( docId varchar2(60) not null, num varchar2(16) not null ) SELECT * FROM esns.temp_update_doc alter table esns.temp_update_doc drop (num); delete from esns.temp_update_doc where docid='2222' drop table esns.temp_update_doc --从回收站恢复被删除的表信息 1、使用drop table删除的表,可以在回收站中查询到 SQL> select object_name,original_name,type from user_recyclebin; 2、恢复drop table删除的表(表放在回收站中会以BIN$开头) SQL> flashback table "BIN$*******" to before drop; 或者flashback table esns.temp_update_doc to before drop; --从回收站恢复被删除的数据行(已经比较)信息 1.需要先开启行移动的功能 alter table esns.temp_update_doc enable row movement; 2.按照时间恢复数据,指定时间之前的数据 flashback table esns.temp_update_doc to timestamp to_timestamp('2012-10-19 10:47:00',' yyyy-mm-dd hh24:mi:ss'); 3.关闭行移动功能 alter table esns.temp_update_doc disable row movement; --实例如下: SQL> select * from esns.temp_update_doc; DOCID ------------------------------------------------------------ 444 SQL> drop table esns.temp_update_doc; Table dropped SQL> select * from esns.temp_update_doc; select * from esns.temp_update_doc ORA-00942: 表或视图不存在 SQL> select object_name,original_name,type from user_recyclebin; OBJECT_NAME ORIGINAL_NAME TYPE ------------------------------ -------------------------------- ------------------------- BIN$xyRCrPvsTOuSCqOkyD80/g==$0 GRADE TABLE BIN$cektyuQqRjacZ7/QeVMJpw==$0 SYS_C005742 INDEX BIN$g3GL4SE7TquJW69BIty+LA==$0 R_DOCUMENT_READ TABLE BIN$kkbpYLg3Rb2yngWIxIrjEg==$0 TEMP_UPDATE_DOC TABLE 4 rows selected SQL> flashback table esns.temp_update_doc to before drop; Done SQL> select * from esns.temp_update_doc; DOCID ------------------------------------------------------------ 444 SQL> delete from esns.temp_update_doc where docid = '444'; 1 row deleted SQL> select * from esns.temp_update_doc ; DOCID ------------------------------------------------------------ SQL> flashback table esns.temp_update_doc to timestamp to_timestamp('2012-10-19 11:01:00',' yyyy-mm-dd hh24:mi:ss'); Done SQL> select * from esns.temp_update_doc; DOCID ------------------------------------------------------------ 444 SQL>