JORGE DIAZ PORRAS,FRANCISCO GARZA,NESTOR DOMINGUEZ.

Chapter Outline  Lesson 8-1  The Essentials of a database  Lesson 8-2  Types of Database Programs  Lesson 8-3  Database techniques

What is a database?  What do the following things have in common: an address book, a telephone directory, a list of family birthdays, and a catalog of DVDs? For one thing, each can be stored in a database, or an organized collection of information.

What is a database?  Databases can exist on paper or on a computer. Computerized databases can be huge, containing information on millions of items. A computerized database is an idea tool for making use of huge amounts of existing data.

What is database  Databases make it easy to store, add, organize, and retrieve information. Suppose a worker has to find the account number for a customer. Imagine how much time that worker saves if he or she can find the information simply by typing the customer’s name instead of searching through piles of paper!

Chapter 8-1 Vocabulary  table tthe underlying structure of a relational database characterized by rows and columns. record aa part of a database that holds data about a particular individual or item.

Vocabulary ffield ppart of a database that holds an individual piece of data. ddata type ssettings applied to a database field, which allow the field to store only information of a specific type and/or format. ggarbage in, garbage out (GIGO) aa phrase that stresses the importance of inputting accurate data in a database.

8-2 vocabulary  object-oriented database  a database that stores objects, such as sound, video, text, and graphics.  key field  an element that links tables in a relational database.  relational database  a database in which shared key fields link data among tables.

8-2 vocabulary  sort  to arrange data in a specific order.  flat-file database  a database that can work with only one table at a time.  database management system (DBMS)  a software program used to manage the storage, organization, processing, and retrieval of data in a database.

Chapter 8-3  Give examples of how to manage information in databases.  Compare and contrast browsing, sorting, and querying data in a database.  Describe the features of a report template. 

Chapter 8-3 SSummarize : As you read the lesson, use a chart to help you summarize techniques for using databases effectively.

 information overload  the result of a computer user being overwhelmed by the amount of information generated by his or her computer  browse  to find information in a database by looking at records one at a time  ascending order  the sorting of data by increasing value

Chapter 8-3  descending order  the sorting of data by decreasing value  report  an ordered list of selected database records and fields in an easy-to-read format  report template  a pattern that controls how data will be displayed in a database report

CHAPTER 8 How is a computerized database organized? What do the following things have in common: an address book, a telephone directory, a list of family birthdays, and a catalog of DVDs? For one thing, each can be stored in a database, or an organized collection of information. Databases can exist on paper or on a computer.

Chapter 8 1.Which of the following is not a part of a database? :worksheets

Chapter 8 answers and questions 22.In a database, a is a unit of information about one individual or item. :record

Chapter 8  3. Which of the following is not an advantage of a computerized database? :the ability to create worksheets

Chapter 8  4.What does the term GIGO stand for? : garbage in, garbage out 

Chapter 8 5.Which type of database allows you to work with data in only one table?

Chapter 8  6. This kind of database can be used to store all kinds of items, such as documents or video clips. :object- oriented database

Chapter 8  7.The same in multiple tables requires the computer to store more information and increases the chance of errors. :data

Chapter 8  8.This means finding data by looking at all the records in a database. :browsing

Chapter 8  9. If you sort data in order of increasing value, such as A–Z or 1–9, what sort order are you using? :ascending

Chapter 8  10. This is a user-created direction that tells the database to find specific records. :query