单项选择题 Which of the following is a potential performance tuning recommendation from the SQL Access Advisor?（）

多项选择题 What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)

单项选择题 Given the following RMAN commands，choose the option that reflects the order required to restore your currently operational ARCHIVELOG-mode database.（）   a. restore database  b. recover database  c. shutdown immediate  d. startup  e. restore archivelog all f. alter database open