📄 que_051.htm
字号:
<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 051
</b></p><hr color="#99CCFF">
<p>
<span style="font-size:16pt;">Evaluate these two SQL statements:</span><span style="font-size:18pt"><br>SELECT last_name, salary , hire_date <br>
FROM EMPLOYEES <br>
ORDER BY salary DESC; <br>
SELECT last_name, salary, hire_date <br>
FROM EMPLOYEES <br>
ORDER BY 2 DESC;
</span></p>
<p><span style="font-size:16pt;">What is true about them? </span></p><table border="1" bordercolor="gray" width="665">
<form name="youAnsForm">
<span style="font-size:18pt;">
<tr>
<td align="center" width="89">
<p><b><span style="font-size:16pt;"><input type="radio" name="AN" value="A"> A.</span></b></p>
</td>
<td align="left" width="566">
<p> <span style="font-size:16pt;">The two statements produce identical results.</span>
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><span style="font-size:16pt;"><input type="radio" name="AN" value="B"> B.</span></b></p>
</td>
<td align="left" width="566">
<p> <span style="font-size:16pt;">The second statement returns a syntax error.</span>
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><span style="font-size:16pt;"><input type="radio" name="AN" value="C"> C.</span></b></p>
</td>
<td align="left" width="566">
<p> <span style="font-size:16pt;">There is no need to specify DESC because the results are sorted in descending order by default.</span>
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><span style="font-size:16pt;"><input type="radio" name="AN" value="D"> D.</span></b></p>
</td>
<td align="left" width="566">
<p> <span style="font-size:16pt;">The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.</span></p>
</td>
</tr>
</span>
</form>
</table>
<span style="font-size:16pt;"><br></span></body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -