多项选择题
Which of the following cannot be used as input to the SQL Tuning Advisor?（） (Choose all that apply.)
A. A single SQL statement provided by a user
B. An existing SQL Tuning Set (STS)
C. A preprocessed Database Replay workload
D. A schema name
E. SQL statement identified in EM as using excessive resources
单项选择题 While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）
单项选择题 RMANofferstheequivalentoftheSQLcommandalterdatabasebackupcontrolfiletotrace.（）
多项选择题 Which two statements about the SQL Management Base (SMB) are true? （）(Choose two.)