SQL> alter database ORCL FORCE LOGGING;
Database altered.
SQL> alter database ORCL NO FORCE LOGGING;
Database altered.
ORCL 为数据为的SID
SQL> alter database ORCL FORCE LOGGING;
Database altered.
SQL> alter database ORCL NO FORCE LOGGING;
Database altered.
ORCL 为数据为的SID