多项选择题
A. flashback query
B. distributed transactions
C. logging in and logging out of sessions
D. all DDL statements having bind variables
E. direct path load of data from external files
单项选择题 Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space, you issued the following command: ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS; What would be the outcome of this command?（）
多项选择题 Which two statements about the SQL Management Base (SMB) are true?（）
多项选择题 Which three statements correctly describe the features of the I/O calibration process?（）