单项选择题 Which SQL statement displays the date March 19, 2001 in a format that appears as "Nineteenth of March 2001 12:00:00 AM"?（）

单项选择题 The EMPLOYEES table contains these columns: You need to write a query that will produce these results: 1. Display the salary multiplied by the commission_pct. 2. Exclude employees with a zero commission_pct. 3. Display a zero for employees with a null commission value. Evaluate the SQL statement: What does the statement provide?（）

单项选择题 A subquery can be used to（）.