How can we use flash back querry

Question

Hi ,
How do we use the flash back querry.
Govardhan

Answer 1

For enabling the Flashback, we need to set this below
in init.ora file.
UNDO_MANAGEMENT = AUTO
UNDO_RETENTION = 1800
declare
cursor c1 is select * from emp;
emprec c1%rowtype;
begin
dbms_flashback.enable_at_time('01-JUL-05:11:00:00');
OPEN C1;
DBMS_FLASHBACK.DISABLE;
LOOP
FETCH c1 into emprec;
exit when c1%notfound;
insert into emp(
EMPNO,
ENAME ,
JOB ,
MGR ,
HIREDATE ,
SAL ,
COMM ,
DEPTNO)
values(emprec.empno,
emprec.ename,
emprec.job,
emprec.mgr,
emprec.hiredate,
emprec.sal,
emprec.comm,
emprec.deptno);
end loop;
close c1;
commit;
end;