Data modeling

1. Why are databases important to business? How do databases generate sales and-or profits? What databases do you interact with, and how do they benefit you? 2. What is meant by requirements gathering, and why is it important to clearly define the data requirements of a database before creating it? 3. Read the General Business Example on page 7 of the Frost

Page Ref: 376 27) The process of reading an actual database schema and producing a data model from that schema is called reverse engineering. Answer: TRUE Diff: 1 Page Ref: 373 28) The data model produced by reverse engineering is a true conceptual schema. Answer: FALSE Diff: 2 Page Ref: 373 29) The data model produced by reverse engineering may include some entities that should not appear in the data model. Answer: TRUE Diff: 2 Page Ref: 373 30) The design produced by reverse

Apply the database development cycle to a given data set Database development creates enterprise data modeling, which forms the range and wide-ranging contents of organizational databases. There are 5 phases in Database Development Cycle: Planning; Analysis; Design; Implementation and Maintenance. Planning In Planning Stage, the organization needs to know why do they need the database; what do they want the database to do; and how are they going to make the database. This is also where the

Evaluation of User Requirement Analysis in Data Warehouse Design 1.0 Introduction A data warehouse (DW) can be acknowledged as one of the most complex information system modules available and it is a system that periodically retrieves and consolidates data from the sources into a dimensional or normalized data store. It is an integrated, subject-oriented, nonvolatile and a time-variant collection of data in support of management’s decisions (Inmon, 1993). 1.1 Data Warehouse Design Process When considering

related to the named model: 1. Attributes –they describe the facts, details or characteristics of an entity. The attributes that maybe contained in an invoice might be price, number, data or paid/unpaid. 2. Table –this is where data is stored for processing and output .The table is defined as a collection of related data consisting of rows and columns. For example, the CUSTOMER or PURCHASES table may comprise of the customer first name, last name address and the product that the customer purchased.

6-1 Data Model Assignment: DAT-500 15TW1 The rental car company is laying the foundation for building a relational database and is already deep within the design phase of the SDLC. Developing enterprise data models will ensure the business requirements are being met and in the long run, spell success for the enterprise. The two entity relationship diagrams the rental car company has established are 1) a Conceptual data model and 2) a Logical data model. Using the process of building these foundational

Introduction 1.1 The Relational Data Model Revisited 1.2 The Vocabulary of Security and Major DB Security Threats 2. Database Security Models 2.1 Discretionary Security Models 2.2 Mandatory Security Models 2.3 Adapted Mandatory Access Control Model 2.4 Personal Knowledge Approach 2.5 Clark and Wilson Model 2.6 A Final Note on Database Security Models 3. Multilevel Secure Prototypes and Systems 3.1 SeaView 3.2 Lock Data Views 3.3 ASD_Views 4. Conceptual Data Model for Multilevel Security

CHAPTER 2: DATA WAREHOUSING Objectives: After completing this chapter, you should be able to: 1. Understand the basic definitions and concepts of data warehouses 2. Understand data warehousing architectures 3. Describe the processes used in developing and managing data warehouses 4. Explain data warehousing operations 5. Explain the role of data warehouses in decision support 6. Explain data integration and the extraction, transformation, and load (ETL) processes 7. Describe real-time (active) data warehousing

Primary Storage b. ROM c. Sequential Access d. Direct Access 12. Ethical computer use policy contains general principles to guide computer user behavior: True or False 13. The smallest unit of data storage, bit, is a contraction of: a. Binary Items b. Bytes In Transition c. Binary Digit d. None of the above 14. A grouping of how many Bits compose a Byte: a. 5 b. 10 c. 8 d. 1 15. The main End-User method of interacting with a computer

Automation in Database Management Since the beginning of big data, there has always been an extensive amount of work required of the database administrators that build and maintain their systems. A trending new technology is making great strides as of lately in reducing the repetitive or mundane tasks that take up the employees’ valuable time. The advent of automation in database maintenance has a promising outlook in making regular procedures more efficient. So what is automation? In its simplest