42、(9-1)choose the best answer:

Which statement is true about the Oracle SQL, DELETE and TRUNCATE statements?

A) DELETE but not TRUNCATE statement can be used to remove data from selective columns and rows of a table.

B) DELETE and TRUNCATE statements can have a rollback done to restore data into a table.

C) DELETE and TRUNCATE statements remove all indexes for the tables on which they are performed.

D) DELETE but not TRUNCATE statement can be used to selectively remove rows from a table.

Answer：D

(解析：Truncate 是删除整张表的数据，delete 不能删除某个列的数据，删除的是行的数据)

【ocp-12c】最新Oracle OCP-071考试题库（42题）的更多相关文章

  1. 【OCP题库-12c】最新CUUG OCP 071考试题库（72题）

    72.View the exhibit for the structure of the STUDENTand FACULTYtables. STUDENT Name Null? Type ----- ...

  2. 【OCP题库-12c】最新CUUG OCP 071考试题库（71题）

    71.(32-18) choose three Which three statements indicate the end of a transaction? (Choose three.) A) ...

  3. 【OCP题库-12c】最新CUUG OCP 071考试题库（70题）

    70.(31-2)choose the best answer: View the Exhibit and examine the structure of the Book table. The B ...

  4. 【OCP题库-12c】最新CUUG OCP 071考试题库（69题）

    69.(31-1)choose the best answer: Evaluate the following query: SELECT INTERVAL '300' MONTH, INTERVAL ...

  5. 【OCP题库】最新CUUG OCP 12c 071考试题库（68题）

    68.(29-13)choose two: Which two statements are true? (Choose two.) A) DICTIONARY is a view that cont ...

  6. 【OCP题库】最新CUUG OCP 12c 071考试题库（67题）

    67.(25-8)choose the best answer: View the Exhibit and examine the structure of CUSTOMERS table. Eval ...

  7. 【OCP题库】最新CUUG OCP 12c 071考试题库（66题）

    66.(22-19)choose two Examine the structure proposed for the TRANSACTIONS table: Which two statements ...

  8. 【OCP题库】最新CUUG OCP 12c 071考试题库（65题）

    65.(22-16) choose the best answer: The CUSTOMERS table has the following structure: You need to writ ...

  9. OCP 12c最新考试题库及答案（071-2）

    2019-02-12 16:23:54   2.(4-7) choose the best answer:You need to display the first names of all cust ...

  10. 【OCP-12c】2019年CUUG OCP 071考试题库（80题）

    80.View the exhibit and examine the structure in ORDERS and ORDER_ITEMS tables. You need to create a ...

随机推荐

  1. django一对一数据库建立和进行数据传输的3种方式all()(对象) values()(字典) values_list()(元组)

    class Business(models.Model): caption = models.CharField(max_length=32) code = models.CharField(max_ ...

  2. BURG For Ubuntu 14.04 Trusty

    sudo add-apt-repository ppa:n-muench/burg sudo apt-get updatesudo apt-get install burg burg-themes D ...

  3. 【转】简述TCP的三次握手过程

    TCP握手协议 在TCP/IP协议中,TCP协议提供可靠的连接服务,采用三次握手建立一个连接.第一次握手:建立连接时,客户端发送syn包(syn=j)到服务器,并进入SYN_SEND状态,等待服务器确 ...

  4. 用 AutoHotKey 随时记录所想

    别被标题咋呼了,其实很简单,按下快捷键自动打开指定文本文档,自动加上当前时间日期,适合像我这种无聊的人记录生活. ;Alt+X 调出 !X:: ;获取当前日期时间并保存到剪贴板 d = @rhinoc ...

  5. DropDownList绑定数据的几种方式

    1. 视图中添加可以直接通过单击属性"Items"后的按钮为某一DropDownList控件添加数据项.每添加一项数据就是添加了一个ListItem(列表控件中的数据项).这种方式 ...

  6. 用jquery实现html5的placeholder功能

    html5的placeholder功能在表单中经常用到,它主要用来提示用户输入信息,当用户点击该输入框之后,提示文字会自动消失. 我们用jquery实现类似的功能: 当输入框获得焦点时,清空输入框中的 ...

  7. JAVA高并发线程

    一.JAVA高级并发 1.5JDK之后引入高级并发特性,大多数的特性在java.util.concurrent 包中,是专门用于多线程发编程的,充分利用了现代多处理器和多核心系统的功能以编写大规模并发 ...

  8. springboot中开发热部署(devtools)

    1.只需要在pom文件中引入devtools的依赖即可 <dependency> <groupId>org.springframework.boot</groupId&g ...

  9. 报错提示：mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given in..的处理方式

    PHP操作数据库的时候如果出现报错: mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given in.. ...

  10. [Tools]SurveyMonkey

    做问卷调查,推荐一个好工具,免费的 SurveyMonkey : it's free, quick & easy! https://www.surveymonkey.com/