单项选择题 View the following SQL statements：   Transaction T1 INSERT INTO hr.regions VALUES （5，’Pole’）；COMMIT；  Transaction T2 UPDATE hr.regions SET region_name=’Poles’ WHERE region_id = 5； COMMIT；  Transaction T3 UPDATE hr.regions SET region_name=’North and South Poles’ WHERE region_id = 5；   You want to back out transaction T2.  Which option would you use？（）

多项选择题 You plan to use SQL Performance Analyzer to analyze the SQL workload. You created a SQL Tuning Set as a part of the workload capturing.  What information is captured as part of this process？（）

单项选择题 You have applications that have frequently executed queries， and produce small and static result sets.  You configure the sqlnet.ora file in the client machine to set a nonzero value for the OCI_RESULT_CACHE_MAX_SIZE parameter.  What is the purpose of this configuration？（）