select * from dataitem a;
create table dataitembak0727
as
select * from dataitem as of timestamp sysdate - 1/24
minus
select * from dataitem a;
select * from dataitem
minus
select * from dataitem as of timestamp sysdate - 1/24 ;
select * from dataitembak0727;
insert into dataitem
select * from dataitembak0727;