多项选择题 When should you create a role? （）

单项选择题 Which clause would you use in a SELECT statement to limit the display to those employees whose salary is greater then 5000?（）

单项选择题 Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) DEPARTMENT_ID NUMBER SALARY NUMBER What is the correct syntax for an inline view?（）