oracle数据库中STATISTICS_LEVEL参数被设置为BASIC，此设置的影响？（)

A. partitioning recommendations

B. statistics collection recommendations

C. index creation recommendations

D. materialized view recommendations

E. materialized view log recommendations

A. partitioning recommendations

B. statistics collection recommendations

C. index creation recommendations

D. materialized view recommendations

E. materialized view log recommendations

A.VIEWS

B.SCHEMATA

C.COLUMNS

D.STATISTICS

A.使用set statistics io语句

B.使用set statistics time语句

C.使用set statistics CPU语句

D.使用set statistics time and CPU语句

A. Oracle uses statistical relevance to determine when an adaptive threshold has been breached for the metric.

B. The statistics for the metric values observed over the baseline time period are not examined to determine threshold values.

C. Oracle determines when an adaptive threshold has been breached based on the maximum value captured by the baseline.

D. The total concurrent number of threshold violations, which must occur before an alert is raised for the metric, has been set to zero.

oracle数据库中实例和数据库是一一对应的。()