单项选择题 You run the SQL Tuning Advisor (STA) to tune a SQL statement that is part of a fixed SQL plan baseline. The STA generates a SQL profile for the SQL statement, which recommends that you accept the profile. Which statement is true when you accept the suggested SQL profile?（）

单项选择题 What is the end result of these commands if they are successful？（）   RMAN> show retention policy；  RMAN configuration parameters for database with db_unique_name  ORCL are： CONFIGURE RETENTION POLICY TO REDUNDANCY 1； # default Backup database tag=gold_copy plus archivelog tag=gold_copy delete input； Backup  database tag=silver_copy plus archivelog tag=silver_copy delete input；

多项选择题 Which three statements about performance analysis by SQL Performance Analyzer are true? （）(Choose three.)