Oracle----高级操作

Oracle备份数据

--备份入库数据
drop table SYS_KEEPACCOUNT_HX_bak;
delete * from SYS_KEEPACCOUNT_HX_bak;
create table SYS_KEEPACCOUNT_HX_bak as (select * from SYS_KEEPACCOUNT_HX  where cdate = to_date('2020-12-02','yyyy-MM-dd'));
commit;
--查询备份入库数据
select * from SYS_KEEPACCOUNT_HX_bak;
select count(1) from SYS_KEEPACCOUNT_HX_bak;

--删除入库的数据
delete  from SYS_KEEPACCOUNT_HX  where cdate = to_date('2020-12-02','yyyy-MM-dd');
commit;

select s_sys_keepaccount_hx.nextval from dual
--还原入库数据
INSERT INTO SYS_KEEPACCOUNT_HX (seqid,FIELD1, FIELD2, FIELD3, FIELD4, FIELD5) 
select s_sys_keepaccount_hx.nextval, FIELD1, FIELD2, FIELD3, FIELD4, FIELD5 from SYS_KEEPACCOUNT_HX_bak,dual  where cdate = to_date('2020-12-02','yyyy-MM-dd');
commit;

orcal回滚操作

查询某个时间点的数据，如果只是少量数据被修改，我们可以直接用查询出来的历史数据来update表

SELECT * FROM 表名 as of TIMESTAMP "TO_TIMESTAMP"('2018-05-29 17:58:00', 'yyyy-MM-dd HH24:mi:ss') WHERE 条件  ;

恢复某个时间点的数据

--开启行移动功能（解决执行以下语句报错问题）
  alter table Dxc_Goods enable row movement;
  --恢复某个时间点的数据
   flashback table Dxc_Goods to timestamp to_timestamp('2019-07-24 18:00:00','yyyy-mm-dd hh24:mi:ss');
  --关闭行移动功能
  alter table Dxc_Goods disable row movement;