Which statement is true while creating subplans using Resource Manager?()
A: The subplan must belong to the consumer group, SYS_GROUP.
B: The total CPU usage at any given level must be less than 100%.
C: The subplans can be used to restrict the degree of parallelism for a user.
D: You can use a resource plan instead of a consumer group to implement a priority ranking within the plan.
出自:Oracle认证