单项选择题
A.The two statements produce identical results.
B.The second statement returns a syntax error.
C.There is no need to specify DESC because the results are sorted in descending order by default.
D.The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.
单项选择题 Which SQL statement accepts user input for the columns to be displayed, the table name, and the WHERE condition?（）
多项选择题 Click the Exhibit button and examine the data in the EMPLOYEES table. Which three subqueries work?（）
单项选择题 Which SQL statement defines a FOREIGN KEY constraint on the DEPTNO column of the EMP table?（）