oracle 恢复到之前某个时间点

--查看备份片的 （TAG20160413T030004）

RMAN>list backupset;

SQL>shutdown immediate;

SQL>startup mount;

RMAN>restore database from tag TAG20160413T030004;

SQL>recover database until time '2016-04-13 08:00:00' using backup controlfile;

SQL>alter database open resetlogs;