Presentation on theme: "BY: Ivan Lopez and Diego Hinojosa. Chapter 8 Overview Lesson 8–1 The Essentials of a Database Lesson 8–2 Types of Database Programs Lesson 8–3 Database."— Presentation transcript:
Chapter 8 Overview Lesson 8–1 The Essentials of a Database Lesson 8–2 Types of Database Programs Lesson 8–3 Database Techniques Chapter Review and Assessment Chapter 8 Overview Lesson 8–1 The Essentials of a Database Lesson 8–2 Types of Database Programs Lesson 8–3 Database Techniques Chapter 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 I am telling u it’s the end!!! FIN