摘要： emca -repos drop --删除一个EM资料库SQL> drop user sysman cascade; --删除用户及相关权限SQL> drop role MGMT_USER; SQL> drop user MGMT_VIEW cascade; SQL> drop public synonym MGMT_TARGET_BLACKOUTS;SQL> drop public synonym SETEMVIEWUSERCONTEXT; emca -repos create --新建一个EM资料库set oracle_hostname=localhostse 阅读全文