que_021.htm

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<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<title>Ocp test </title>
</head>
<body bgcolor="white" text="black" link="blue" vlink="purple" alink="red">
<p align="left" color="black" style="font-size:16pt;">
	<b>QUESTION 021	
</b></p><hr color="#99CCFF">

<p>The EMP table contains these columns:</p><table border="1" bordercolor="gray">
	<tr>
		<td align="left" width="486" bgcolor="#99CCFF">
			<p><b>EMP  table  </b></p>
		</td>
	</tr>
	<tr>
		<td align="left" bgcolor="white">
			<p><b>LAST  NAME  VARCHAR2(25)  </b></p>
		</td>
	</tr>
	<tr>
		<td align="left" bgcolor="white">
			<p><b>SALARY  NUMBER(6,2)  </b></p>
		</td>
	</tr>
	<tr>
		<td align="left" bgcolor="white">
			<p><b>DEPARTMENT_ID  NUMBER(6)  </b></p>
		</td>
	</tr>
</table>
<p>You need to display the employees who have not been assigned to any department. <br>
You write the SELECT statement: 
<br><br>SELECT LAST_NAME, SALARY, DEPARTMENT_ID <br>
FROM EMP <br>
WHERE DEPARTMENT_ID = NULL; <br>
<br>What is true about this SQL statement?</p><table border="1" bordercolor="gray" width="665">
	<form name="youAnsForm">
	<span style="font-size:18pt;">
	<tr>
		<td align="center" width="89">
			<p><b><input type="radio" name="AN" value="A">  A.</b></p>
		</td>
		<td align="left" width="566">
			<p> The SQL statement displays the desired results. 
			</p>
		</td>
	</tr>
	<tr>
		<td align="center" width="89">
			<p><b><input type="radio" name="AN" value="B">  B.</b></p>
		</td>
		<td align="left" width="566">
			<p>   The column in the WHERE clause should be changed to display the desired results. 
			</p>
		</td>
	</tr>
	<tr>
		<td align="center" width="89">
			<p><b><input type="radio" name="AN" value="C">  C.</b></p>
		</td>
		<td align="left" width="566">
			<p>   The operator in the WHERE clause should be changed to display the desired results. 
			</p>
		</td>
	</tr>
	<tr>
		<td align="center" width="89">
			<p><b><input type="radio" name="AN" value="D">  D.</b></p>
		</td>
		<td align="left" width="566">
			<p>   The WHERE clause should be changed to use an outer join to display the desired 
			  results.</p>
		</td>
	</tr>
	</span>
	</form>
</table>

<br></body>
</html>

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