单项选择题
A. WHERE
B. HAVING
C. RESTRICT
D. GROUP BY
E. ORDER BY
单项选择题 Evaluate these two SQL statements:SELECT last_name, salary, hire_dateFROM EMPLOYEES ORDRE BY salary DESC; SELECT last_name, salary, hire_dateFROM EMPOLYEES ORDER BY 2 DESC; What is true about them?（）
单项选择题 Which is an iSQL*Plus command?（）
单项选择题 Which object privileges can be granted on a view?（）