📄 exp_038.htm

📁 oracle　DBA的资料

💻 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><b><span style="font-size:22pt">Explaination 038: &nbsp;</span></b></p>

<span style="font-size:18pt">
	<p>
	This statement lists the ID, name, and salary of the employee, and the ID and name of the<br>
	</p>

	<p>
	  employee's manager, for all the employees who have a manager and earn more than 4000 Incorrect Answers <br>
	</p>

	<p>
	  A: This statement does not check does employee have a manager or not, so it will not provide correct result. <br>
	</p>

	<p>
	  B: Usage of "e.mgr_id = m.mgr_id" condition is wrong to achieve required result. <br>
	</p>

	<p>
	  D: This statement uses "m.mgr_id" to show manager's manager, not employ's manager. <br>
	</p>

	<p>
	  E: Usage of "WHERE e.employee_id = m.employee_id" condition is wrong to achieve required result. <br>
	</p>

	<p>
	  OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 118-122 <br>
	</p>

	<p>
	  Chapter 3: Advanced Data Selection in Oracle
	</p>

</span>

</body>
</html>
<br>

⌨️ 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 + -