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Question: 1. Explain why the following two commands produce different results: SELECT DISTINCT COUNT (V_CODE) FROM PRODUCT; SELECT COUNT (DISTINCT V_CODE) FROM PRODUCT;
2. What is the difference between the COUNT aggregate function and the SUM aggregate function?
3. Explain why it would be preferable to use a DATE data type to store date data instead of a character data type.
4. What is a recursive join?
What are the differences between the Oracle database SYSDBA and SYSOPER privileges? Explain OS authentication and how that allows you to connect to the database as SYS without providing a password
List all students and courses they are registered for. Include, in this order, CustomerNumber, CustomerName, Phone, CourseNumber, and AmountPaid.
Give a primary key for each relation. Are there any relations for which there is an alternate candidate key which you have not chosen as the primary key? Why or why not?
What is the difference between a database and a table? What two conditions must be met before an entity can be classified as a weak entity? Give an example of a weak entity.
A machine shop located on the outskirts of Los Angeles accepts custom orders from a number of high-tech firms in southern California.
Visual Studio Express to build a Web-site with Access database - Olivias Mountain Adventure Store (OMAS)
Create the primary key and foreign keys using a UML Class diagram for each table. Describe the data structure that will store all data elements.
Draw an entity relationship diagram (ERD) for the following situation: A company has a number of employees. Each employee is identified by an Employee_Id. The company wants to store Employee_Name, Employee_Address, and Employee_BirthDate in the d..
Design a minimal relational database for Pieces Boutique. By minimal, it is meant that option to post a key into existing table because of either needed participation or a discernible high load could be exercised where appropriate.
For this assignment, you will use Visio Software Application to develop the design employing the following computer-aided software engineering (CASE) modeling tools.
Imagine you are a senior systems administrator who has recently been given the task to help improve security of your company's IT infrastructure after a series of network security breaches.
What degree is the student working towards. A student can only work on one degree at a time. What classes are necessary to obtain a specific degree
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