怎样进行Oracle Delete表的恢复

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Oracle Delete表恢复(ODU)

表中数据被DELETE

·   (1)将参数unload_deleted设置为YES

·   (2)生成数据字典：unload dict

·   (3)恢复表: unload tableusername.tablename

---模拟误删除

create table t0 as select * from dba_objects;

create table t0_bak as select * from t0;

select count(*) from t0; ---86159

delete t0 where object_id>85000; commit;

select count(*) from t0;

---84141

一：将参数unload_deleted设置为YES

二：生成数据字典

三：恢复表

rename t0 to tt0;

CREATE TABLE "CHEN"."T0"

(

    "OWNER" VARCHAR2(30) ,

    "OBJECT_NAME" VARCHAR2(128) ,

"SUBOBJECT_NAME" VARCHAR2(30) ,

    "OBJECT_ID" NUMBER ,

    "DATA_OBJECT_ID" NUMBER ,

    "OBJECT_TYPE" VARCHAR2(19) ,

    "CREATED" DATE ,

"LAST_DDL_TIME" DATE ,

    "TIMESTAMP" VARCHAR2(19) ,

    "STATUS" VARCHAR2(7) ,

    "TEMPORARY" VARCHAR2(1) ,

"GENERATED" VARCHAR2(1) ,

    "SECONDARY" VARCHAR2(1) ,

    "NAMESPACE" NUMBER ,

    "EDITION_NAME" VARCHAR2(30)

);

四：通过sqlldr将数据加载到数据库

5：验证数据

select count(*) from t0; ---86159

select * from t0 where object_id>85000;

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