oracle 快照

select count(*) from atzserreportb

drop snapshot atzserreportb

Create snapshot atzserreportb as select * from atzserreportb@ORCL_Online;

Alter snapshot atzserreportb  refresh fast Start with sysdate+1/(24*60) next sysdate+10/(24*60); 

SELECT NAME,LAST_REFRESH FROM ALL_SNAPSHOT_REFRESH_TIMES;

select last_date,next_date,what from user_jobs order by next_date;

　　create public database link 链路名  connect to 用户 identified by 口令 using '连接字符串';