单项选择题 Evaluate the following SQL statement used to create the PRODUCTS table：   CREATE TABLE products （product_id NUMBER（3） PRIMARY KEY， product_desc VARCHAR2（25）， qtyNUMBER（8，2）， rate NUMBER（10，2）， total_value AS （ qty * rate）） PARTITION BY RANGE （total_value） （PARTITION p1 VALUES LESS THAN （100000）， PARTITION p2 VALUES LESS THAN  （150000）， PARTITION p3 VALUES LESS THAN （MAXVALUE））  COMPRESS FOR ALL OPERATIONS；   Which statement is true regarding this command？（）

单项选择题 You plan to control idle sessions that are blocking other sessions from performing transactions. Your requirement is to automatically terminate these blocking sessions when they remain idle for a specified amount of time. How would you accomplish this task?（）

单项选择题 Examine the following RMAN command:RMAN> CONFIGURE ENCRYPTION FOR DATABASE ON;RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which prerequisite must be met before accomplishing the backup?（）