怎樣進行Oracle Delete表的恢復

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Oracle Delete表恢復(ODU)

表中數據被DELETE

·   (1)將參數unload_deleted設置為YES

·   (2)生成數據字典：unload dict

·   (3)恢復表: unload table username.tablename

---模擬誤刪除

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：將參數unload_deleted設置為YES

二：生成數據字典

三：恢復表

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：通過sqlldr將數據加載到數據庫

5：驗證數據

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

select * from t0 where object_id>85000;

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