BY: Ivan Lopez and Diego Hinojosa

Chapter 8 OverviewLesson 8–1 The Essentials of a Database

Lesson 8–2 Types of Database ProgramsLesson 8–3 Database TechniquesChapter Review and Assessment

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. 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 ideal tool for making use of huge amounts of existing data.

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!

Database an organized

collection of information that may or may not be stored in a computer

base de datos• conjunto

organizado de información que puede estar guardado o no en una computadora

table   the underlying structure of a

relational database characterized by rows and columns

tabla   estructura subyacente de una base

de datos relacional caracterizada por filas y columna

record   a part of a database that holds data

about a particular individual or item registro   parte de una base de datos que

contiene datos acerca de un individuo o elemento específico

field   part of a database that holds an

individual piece of data

campo   parte de una base de datos que

contiene un dato individual

data type   settings applied to a database field,

which allow the field to store only information of a specific type and/or format

tipo de datos   parámetros que se aplican a un campo

de base de datos, que permiten al campo almacenar información de un solo tipo y/o formato específico

garbage in, garbage out (GIGO)   a phrase that stresses the

importance of inputting accurate data in a database

entra basura, sale basura   frase que destaca la importancia de

introducir datos precisos en una base de datos

1.Which of the following is not a part of a database?D. worksheets

   2.In a database, a _____ is a unit of information about one individual or item.

C. Record

3.Which of the following is not an advantage of a computerized database?

C. The ability to create worksheets

4.What does the term GIGO stand for?C. Garbage in, garbage out

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

C. flat-file database

6.This kind of database can be used to store all kinds of item such as documents or video clips.

C. Multimedia database

7._____ the same data in multiple tables requires the computer to store more information and increases the chance of errors.

B. Avoiding

8. This means finding data by looking at all the records in a database.

D. browsing

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

A. Ascending

 10.This is a user-created direction that tells the database to find specific records.

C. query

 11.A database is an organized collection of information.

A. True

 12.Databases typically store all their data in one large table.

B. False

 13.A field’s data type determines what kind of information can be stored there.

A. True

 14.A computerized database can store millions of telephone numbers.

A. True  15.One disadvantage of computerized databases is that

they limit your ability to arrange information. B. False

 16.The same features that make databases efficient tools also enable them to keep data secure.

B. False

 17.Instead of storing the same data in multiple tables, it is more efficient to store the data in one table and link it to other tables.

A. True

 18.The people who create databases can avoid causing information overload by summarizing information so that it does not overwhelm the databases’ users.

A. True

 19.If you sort a database’s information chronologically, then you are sorting letters and symbols.

B. False

 20.A query lets you speed up the browsing process by finding information that matches specific criteria.

A. True

The end The end

The end THE END

I am telling u it’s the end!!! FIN