单项选择题
A. CREATE INDEX NAME_IDX (first_name, last_name);
B. CREATE INDEX NAME_IDX (first_name AND last_name);
C. CREATE INDEX NAME_IDX ON (first_name, last_name);
D. CREATE INDEX NAME_IDX ON employees (first_name AND last_name);
E. CREATE INDEX NAME_IDX ON employees(first_name, last_name);
F. CREATE INDEX NAME_IDX FOR employees(first_name, last_name);
单项选择题 Exhibit: Examine the data in the EMPLOYEES table. Examine the subquery: SELECT last_name FROM employees WHERE salary IN (SELECT MAX(salary) FROM employees GROUP BY department_id); Which statement is true?（）
单项选择题 The DBA issues this SQL command:CREATE USER scott IDENTIFIED by tiger;What privileges does the user Scott have at this point?（）
多项选择题 Which four are correct guidelines for naming database tables?（）
