Exam 1 Study Guide

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					MIS2502: Exam 1 Study Guide

The exam will be a combination of short-answer and multiple-choice questions. It is a closed-book,
closed-notes exam.

The following is a list of items that you should review in preparation for the exam. Note that not every
item on this list may be on the exam, and there may be items on the exam not on this list.

The Things You Can Do With Data/The Information Architecture of an Organization

   What is the difference between data and information?
   What is a transaction?
   What are the characteristics of an operational data store?
      o What are the goals of this type of database?
   What are the characteristics of an analytical data store?
      o What are the goals of this type of database?
   What is the relationship between an operational data store and an analytical data store?
   MGM Case
      o What was the key issue that MGM wanted to address?
      o How did MGM use data to make better decisions?
      o What kind of data did they collect? What kind of information were they trying to create?



Relational Data Modeling

   Identify and define entities, relationships, and attributes
   Cardinality
        o One-to-one, one-to-many, many-to-many, optional (i.e., 0 to many)
   Be able to draw an ERD based on a description
   Two way and three-way relationships
   Identify when attributes describe entities and when they describe relationships
   Be able to turn an ERD into a schema
        o Draw the tables based on the entities and relationships
        o Implement one-to-many relationships by placing a primary key from one table into a second
             table as a foreign key
        o Create many-to-many relationships by decomposing two entities in the ERD into three
             tables in the schema
   Given data from two tables, be able to draw the results of a join of those tables



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MIS2502: Exam 1 Study Guide                                                                   Page 2

SQL (we’ll only cover SELECT for this exam)

   Given a schema of a database, be able to create a SQL statement to answer a question
        o i.e., In what state does customer Bob Smith live?
                How many people live in Pennsylvania?
        o You will be provided the general syntax of the SELECT statement, the WHERE clause, etc.,
            but you will need to know how to apply them!
   Understand how to use
        o WHERE
        o GROUP BY
        o ORDER BY
        o COUNT, AVG, MIN, MAX
   Using the WHERE clause to create a join of two tables

				
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