43、(9-2)choose three

Which three tasks can be performed by DDL statements?

A) preventing data retrieval from a table outside of office hours

B) modifying a table to prevent data that violate certain conditions from being entered in a column

C) preventing any data modification to a table

D) creating multiple savepoints to enable partial rollback of a transaction

E) providing an alternative name for a table

Anser：BCE

(解析：B 答案可以用添加约束来解决;C 答案可以用 alter 命令把表变成只读模式;E 答案可以通过创建同义词来实现，这道题比较灵活，表达的比较隐晦。)

【ocp-12c】最新Oracle OCP-071考试题库（43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. InnoDB: The log sequence number in ibdata files does not match

    InnoDB: The log sequence number in ibdata files does not matchInnoDB的:在ibdata文件的日志序列号不匹配 可能ibdata文件损 ...

  2. JSF多列预选择

    <script type="text/javascript"> jQuery(document).ready(function () { preSelect(); }) ...

  3. IMMDevice::Activate and specifying IID_IBaseFilter as the interface identifier

    Use the IMMDevice pointer to the endpoint returned by the enumeration process to activate the desire ...

  4. c# 之Web.config

    Web.config文件是一个XML文本文件,它用来储存 ASP.NET Web 应用程序的配置信息(如最常用的设置ASP.NET Web 应用程序的身份验证方式), 它可以出现在应用程序的每一个目录 ...

  5. 【转】跨DLLnew delete问题

    转两篇文章来说这个问题的 链接1:https://blog.csdn.net/notebook2001a/article/details/6647850 链接2:https://blog.csdn.n ...

  6. idea提示，格式化代码，清除不使用的包快捷键，maven自动导jar包

    一.提示快捷键 idea默认快捷键是ctrl+space,通常和别的软件快捷键冲突,所以将快捷键修改为alt+/ 二.格式化快捷键ctrl+alt+l,通常和qq.tim快捷键冲突,请修改qq或者ti ...

  7. C++ 基类指针，子类指针，多态

    基类指针和子类指针之间相互赋值(1)将子类指针赋值给基类指针时,不需要进行强制类型转换,C++编译器将自动进行类型转换.因为子类对象也是一个基类对象. (2)将基类指针赋值给子类指针时,需要进行强制类 ...

  8. 25.Reverse Nodes in k-Group (List)

    Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If ...

  9. 如何去掉UItableview headerview黏性

    有时候使用UITableView所实现的列表,会使用到header view,但是又不希望它粘在最顶上而是跟随滚动而消失或者出现,下面的代码片段就是实现此功能 sectionHeaderHeight ...

  10. 将Halcon导出的多个dxf文件合并成一个分图层的dxf文件

    Halcon中可以通过concat_obj合并多个XLD,并且可以通过write_contour_xld_dxf再将XLD保存为.dxf文件.但是,保存后的.dxf文件用AutoCAD打开后发现,它们 ...