que_053.htm
来自「oracle DBA的资料」· HTM 代码 · 共 126 行
HTM
126 行
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<title>Ocp test </title>
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<body bgcolor="white" text="black" link="blue" vlink="purple" alink="red">
<p align="left" color="black" style="font-size:16pt;">
<b>QUESTION 053 </b>
</p><hr color="#99CCFF">
<p>The CUSTOMERS table has these columns:</p><table border="1" bordercolor="gray">
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<td align="left" width="486" bgcolor="#99CCFF">
<p><b>The CUSTOMERS table </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>CUSTOMER_ID NUMBER(4) NOT NULL </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>CUSTOMER_NAME VARCHAR2(100) NOT NULL </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>STREET_ADDRESS VARCHAR2(150) </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>CITY_ADDRESS VARCHAR2(50) </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>STATE_ADDRESS VARCHAR2(50) </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>PROVINCE_ADDRESS VARCHAR2(50) </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>COUNTRY_ADDRESS VARCHAR2(50) </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>POSTAL_CODE VARCHAR2(12) </b></p>
</td>
</tr>
<tr>
<td align="left" bgcolor="white">
<p><b>CUSTOMER_PHONE VARCHAR2(20) </b></p>
</td>
</tr>
</table>
<p>Which statement finds the rows in the CUSTOMERS table that do not have a postal code? </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> SELECT customer_id, customer_name <br>
FROM customers <br>
WHERE postal_code CONTAINS NULL;
</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> SELECT customer_id, customer_name <br>
FROM customers <br>
WHERE postal_code = '________';
</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> SELECT customer_id, customer_name <br>
FROM customers <br>
WHERE postal_code IS NULL;
</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> SELECT customer_id, customer_name <br>
FROM customers <br>
WHERE postal code IS NVL;
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><input type="radio" name="AN" value="E"> E.</b></p>
</td>
<td align="left" width="566">
<p> SELECT customer_id, customer_name <br>
FROM customers <br>
WHERE postal_code = NULL;</b></p>
</td>
</tr>
</span>
</form>
</table>
</body>
</html>
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