多项选择题
A. partitioning recommendations
B. statistics collection recommendations
C. index creation recommendations
D. materialized view recommendations
E. materialized view log recommendations
多项选择题 Which three tasks can be performed using a duplicate database? （）(Choose three.)
单项选择题 Examine the CREATE DISKGROUP command used to create a disk group: SQL> CREATE DISKGROUP misc EXTERNAL REDUNDANCY DISK ORCL: FRA3 NAME misc1, ORCL: FRA4 NAME misc2; In which situation would you use this method of disk group creation?（）
单项选择题 Inwhichcasesisreferencepartitioningeffectiveinenhancingperformance？（）