为了自由，幸福而不断奋斗，前行！！！

摘要： Q: 41 Which two statements complete a transaction? (Choose two.)A. DELETE employees;B. DESCRIBE employees;C. ROLLBACK TO SAVEPOINT C;D. GRANT SELECT ON employees TO SCOTT;E. ALTER TABLE employees SET UNUSED COLUMN sal;F. SELECT MAX(sal) FROM employees WHERE department_id = 20;Answer: D, E解：When Does 阅读全文