问题:
A . The optimizer statistics are collected automatically.
B . Only the timed operating system (OS) statistics and plan execution statistics are collected.
C . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
D . The snapshots for the Automatic Workload Repository (AWR) are not generated automatically.
E . Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.
● 参考解析
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