Which two statements describe the implications of this?(Choose two.)
A. It produces less accurate results of the comparison analysis.
B. It automatically calls the SQL Tuning Advisor for recommendations.
C. It shortens the time of execution and reduces the impact on system resources.
D. Only the changes in the execution plan,and not performance regression,are detected.
答案：（A、C）
解析：
只产生执行计划可以更少的去计算结果，同时减少对系统资源的影响