Standby database instance is not mounted
备用数据库实例必须处于挂载状态才能执行重做应用。实例已启动但尚未挂载。
SELECT instance_name, status FROM v$instance;
SELECT database_role, open_mode FROM v$database;
SELECT process, status FROM v$managed_standby;
「DataGuard」在课程 Day 41-50 中有 10 篇完整实战教程