Which three statements about performance analysis by SQL Performance Analyzer are true? （）(Choose three.)
AIt detects changes in SQL execution plans.
BIt produces results that can be used to create the SQL plan baseline.
CThe importance of SQL statements is based on the size of the objects accessed.
DIt generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.
EIt shows only the overall impact on workload and not the net SQL impact on workload.
What would indicate intra-partition parallelism in an Optimizer Plan?（）
A、BTQ
B、LTQ
C、IP
D、DTQ
消费需求的（）反映到日常生活中就是消费时尚和消费流行。
A、多样性
B、层次性
C、发展性
D、时代性
Which of the following is a prerequisite for running DBMS_TDB.CHECK_DB to a successful completion？（）
A、 The database must be in read-write mode.
B、 The database must have no external files.
C、 The database must open in read-only mode.
D、 The database must be mounted but not opened.
使用（）登高作业时，闭锁部件应完好，底部坚实防滑.
A、铁架
B、桌子
C、凳子
D、梯子
