44、(9-12)choose all that apply

View the Exhibit and examine the details of the ORDER_ITEMS table.

Evaluate the following SQL statements:

Statement 1:

SELECT MAX(unit_price*quantity) "Maximum Order"

FROM order_items;

Statement 2:

SELECT MAX(unit_price*quantity) "Maximum Order"

FROM order_items

GROUP BY order_id;

Which statements are true regarding the output of these SQL statements? (Choose all that apply.)

A) Both statements would ignore NULL values for the UNIT_PRICE and QUANTITY columns.

B) Statement 1 would return only one row of output.

C) Both the statements would give the same output.

D) Statement 2 would return multiple rows of output.

E) Statement 1 would not return any row because the GROUP BY clause is missing.

Anser:ABD

(解析:对于 null 值,Oracle 计算的时候结果为空,但是在求最大值的时候,会忽略)

SQL> select sal*comm from emp;

SAL*COMM

----------

480000

625000

1750000

SQL> select max(sal*comm) from emp;

MAX(SAL*COMM)

-------------

1750000

【ocp-12c】最新Oracle OCP-071考试题库(44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多对多数据库建立 以及数据的传输 并进行增加 删除 修改

    多对多数据库的建立 class Host(models.Model): nid = models.AutoField(primary_key=True) #自增id hostname = models ...

  2. 问题记录,StartCoroutine(“str")问题

    StartCoroutine参数为函数字符串名,运行时出错,错误是:无法启动协程函数. 调用格式如下: gameManager.StartCoroutine(LuaOnLevelwasloaded() ...

  3. Python Geoip 获取IP地址经度、纬度

    简介: 除了一些免费的 API 接口,例如 http://ipinfo.io/223.155.166.172 可以得到一些信息外,还可以通过 python-geoip 库来解决这个问题. shell ...

  4. LevelDB Version

    [LevelDB Version] Version 保存了当前磁盘以及内存中所有的文件信息,一般只有一个Version叫做"current" version(当前版本).Level ...

  5. socket & pipe note

    [socket & pipe note] 1.socket类型 2.大小端 3.socketpair 如何创建全双工管道? 直接的办法当然是pipe两次,创建两组管道,但是有没有更简单的呢? ...

  6. python安装h5py

    sudo pip install cython sudo apt-get install libhdf5-dev sudo pip install h5py test: python import h ...

  7. 把CString转化为char*

    转:http://blog.sina.com.cn/s/blog_58e19ae7010003jt.html 正确方法:CString m_Head:char *codefile;codefile=( ...

  8. How To Debug Qmake Pro File

    对于程序代码,我们经常使用到调试. 可是,对于有些项目的配置文件,比如Qt的Pro文件, 一个项目复杂的话,Pro文件就很容易出错. 此时的Pro文件,如果也能调试的话,那么是十分的快捷方便的. 解决 ...

  9. AppleScript: Handler

    AppleScript绝对是个奇葩的存在!不管功能有多强大. Handler有两种,一种是和OC类似的使用Label参数,一种是和javascript类似的使用括号把一堆参数都放在里面的. label ...

  10. iOS隐藏导航条1px的底部横线

    第二种方法:1)声明UIImageView变量,存储底部横线 @implementation MyViewController { UIImageView *navBarHairlineImageVi ...