备份前准备 创建备份用户 create user backup identified by backup#2018 ; 授予导入导出角色 grant connect,resource to backup; grant exp_full_database,imp_full_database to backup; 创建逻辑目录 create or replace directory oradmp as '/oradmp'; 授予备份用户逻辑目录读写权限 grant read,write on dir…