（244）Which two statements are true regarding the starting of the database instance using the following command? (Choose two.)

SQL>STARTUP UPGRADE

A. It enables all system triggers.

B. It allows only SYSDBA connections.

C. It ensures that all job queues remain active during the upgrade process.

D. It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.

答案：（B、D）

解析：

SQL*Plus的STARTUP命令