Converting a Physical Standby Database into a Snapshot Standby Database
shutdown immedaite startup mount ALTER DATABASE CONVERT TO SNAPSHOT STANDBY; alter database open;
Converting a Snapshot Standby Database into a Physical Standby Database
shutdown immedaite startup mount ALTER DATABASE CONVERT TO PHYSICAL STANDBY; alter database open;--如果出现ORA-01507: database not mounted,重启数据库 alter database recover managed standby database disconnect from session; alter database recover managed standby database using current logfile disconnect from session;