【ocp-12c】最新Oracle OCP-071考试题库(42题)
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
- 【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 ----- ...
- 【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) ...
- 【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 ...
- 【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 ...
- 【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 ...
- 【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 ...
- 【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 ...
- 【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 ...
- 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 ...
- 【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
- C++ 获取特定进程的CPU使用率<转>
C++ 获取特定进程的CPU使用率 近来发现笔记本在关闭屏幕后风扇转得特别快,打开屏幕后看任务管理器,风扇马上减速,也没有发现大量占用CPU的进程.于是想写一个小程序在后台记录每个进程的CPU使用情况 ...
- 如何在ArcMap中监听键盘鼠标事件(转)
如何在ArcMap中监听键盘鼠标事件(转) Link: http://www.cnblogs.com/dyllove98/p/3155551.html 昨天有个朋友想要实现一个功能,就是在ArcMap ...
- Python运维开发基础04-语法基础
上节作业回顾(讲解+温习90分钟) #!/usr/bin/env python3 # -*- coding:utf-8 -*- # author:Mr.chen # 仅用列表+循环实现"简单 ...
- 【BZOJ4154】Generating Synergy【kd树】
题意 给定一棵以1为根的有根树,初始所有节点颜色为1,每次将距离节点a不超过l的a的子节点染成c,或询问点a的颜色 分析 我们以dfs序为横坐标,深度为纵坐标,建kd树.我们每次更新,都是在kd树中更 ...
- Zend Studio使用综述
1.如何将zend studio 9的默认GBK编码设置为其它编码,例如UTF-8? 选 择window菜单->Preferences->General->Workspace,在界 ...
- 单源最短路:Bellman-Ford算法 及 证明
描述: 求图中某一点到其他任一点的最短距离. 操作: 1. 初始化 结果保存在一个dist数组里,源点的结果初始化为0,其他初始化为无穷大(如INT32_MAX). 2. 计算: 两重for循环,第一 ...
- 使用mybatis提供的各种标签方法实现动态拼接Sql。使用sql片段提取重复的标签内容
Sql中可将重复的sql提取出来,使用时用include引用即可,最终达到sql重用的目的,如下: <select id="findUserByNameAndSex" par ...
- 查询测试程序中的selectOne和selectList函数
selectOne查询一条记录,如果使用selectOne查询多条记录则抛出异常: org.apache.ibatis.exceptions.TooManyResultsException: Expe ...
- Linux TCP拥塞控制算法原理解析
这里只是简单梳理TCP各版本的控制原理,对于基本的变量定义,可以参考以下链接: TCP基本拥塞控制http://blog.csdn.net/sicofield/article/details/9708 ...
- juniper交换机配置
1.链接串口配置: minicom -s ```bash Serial port setup A - Serial Device : /dev/ttyS1 ...