Which three statements are true about Automatic Workload Repository (AWR)?
A.All AWR tables belong to the SYSTEM schema. B.The AWR data is stored in memory and in the database. C.The snapshots collected by AWR are used by the self-tuning components in t he database D.AWR computes time model statistics based on time usage for activities which are displayed in t he v$SYS time model and V$SESS_TIME_MODEL views. E.AWR contains system wide tracing and logging information.正确答案BCD
