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	<b>QUESTION 179	
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<p>Evaluate these two SQL statements: 
<br><br>SELECT last_name, salary, hire_date<br>FROM EMPLOYEES <br>ORDER BY salary DESC; 
<br><br>SELECT last_name, salary, hire_date<br>FROM EMPLOYEES <br>ORDER BY 2 DESC; 
<br><br>What is true about them? </p><table border="1" bordercolor="gray" width="665">
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			<p><b><input type="radio" name="AN" value="A">  A.</b></p>
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			<p> The two statements produce identical results. 
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			<p><b><input type="radio" name="AN" value="B">  B.</b></p>
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			<p>   The second statement returns a syntax error. 
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			<p><b><input type="radio" name="AN" value="C">  C.</b></p>
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			<p>   There is no need to specify DESC because the results are sorted in descending order by default. 
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			<p><b><input type="radio" name="AN" value="D">  D.</b></p>
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			<p>   The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.</p>
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