our database is in the MOUNT state and you execute the following command to open it： ALTER DATABASE OPEN What two actions are performed as a result of this command？（）
Your database is in manual archive mode. Your online redo log groups are configured as fol...
2、若a=5，b=3，c=4，逻辑表达式!（a+b）&；&；!c的值
若a=5，b=3，c=4，逻辑表达式!（a+b）&；&；!c的值为（）A0B-1C1D2
Your database is in ARCHIVELOG mode. You have two online redo log groups，each of which co...
Your database is in ARCHIVELOG mode. On Friday evening， you perform an online database backup&...
Your database is in ARCHIVELOG mode. You have two online redo log groups each of which&ens...
表达式10>5&&6%3的值是()A-1B非零值C0D1