数据清洗、特征工程和数据可视化、数据挖掘与建模的主要内容

–查询 执行 delete 的语句 ，拿到删除的时间 FIRST_LOAD_TIME ，删除行数可参考 ROWS_PROCESSED

select t.FIRST_LOAD_TIME,t.ROWS_PROCESSED,t.* from v$sql t where t.sql_text like '%delete from trade%' ;

select *
  from trade as of timestamp to_timestamp('2023-12-07/14:21:03','yyyy-MM-dd HH24:mi:ss') t

这句是查询出时间点该表所有备份数据

– 时间放在查询语句中

insert into trade(
select *
  from trade as of timestamp to_timestamp('2023-12-07/14:21:03','yyyy-MM-dd HH24:mi:ss') t
 where not EXISTS (select 1
          from trade d where t.id = d.id ));