exp_028.htm

来自「oracle　DBA的资料」· HTM 代码 · 共 50 行

HTM

50 行

<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 028: &nbsp;</span></b></p>

<span style="font-size:18pt">
	<p>
	When we want to alter the underlying data used in the definition of a view, we use the CREATE OR REPLACE VIEW statement. When a CREATE OR REPLACE VIEW statement is issued, Oracle will disregard the error that arises when it encounters the view that already exists with that name, and it will overwrite the definition for the old view with the definition for the new one. <br>
	</p>

	<p>
	  Incorrect Answers <br>
	</p>

	<p>
	  A: There is no ALTER VIEW command in Oracle. <br>
	</p>

	<p>
	  B: There is no MODIFY VIEW command in Oracle. <br>
	</p>

	<p>
	  C: There is no ALTER VIEW command in Oracle. <br>
	</p>

	<p>
	  D: There is no MODIFY VIEW command in Oracle. <br>
	</p>

	<p>
	  F: You don't need to remove the existing view to create modified view. You are able to do that with CREATE OR REPLACE command. <br>
	</p>

	<p>
	  OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 310-313 <br>
	</p>

	<p>
	  Chapter 7: Creating Other Database Objects in Oracle
	</p>

</span>

</body>
</html>
<br>

exp_028.htm - 源码说明

本页面展示了「oracle　DBA的资料」中的 exp_028.htm 源码文件，采用 HTM 编程语言编写，共 50 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫开发者社区收录了大量与Oracle相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

复制代码Ctrl + C

搜索代码Ctrl + F

全屏模式F11

增大字号Ctrl + =

减小字号Ctrl + -

显示快捷键?