A. Access path analysis is not performed for SQL statements.
B. SQL structure analysis is not performed for SQL statements.
C. SQL Profile recommendations are not generated for SQL statements.
D. Staleness and absence of statistics are not checked for the objects in the SQL Tuning Advisor.
答案：（C）
解析：
《Performance Tuning》 17.3.2
SQL Tuning Advisor提供选项来管理优化任务的scope和duration。scope的设置可以如下：
Limited--SQL Tuning Advisor基于统计信息检查、访问路径分析、SQL结构分析产生建议. 不会产生SQL profile建议.
Comprehensive--SQL Tuning Advisor在指定的scope内执行所有的分析,包括SQL Profile.
也可以对优化任务指定时间限制（默认为30分钟)