When does Oracle9i flag an index as being used in the V$OBJECT_USAGE view？（）
- ADuring a query’s parse time only.
- BDuring a query’s execution time only.
- CDuring any kind of DML statement execution.
- DDuring the execution of an INSERT statement only.
问题
When does Oracle9i f
参考解析：
分类：1Z0-032题库
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