Download 4 - BISD

By: HER AND ME
What is 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 an ideal databases can be huge, containing information on millions of items.
A computerized database is tool for making use of huge amounts of existing data.
◦ 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.
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!
DATABASE

an organized
collection of
information that
may or may not be
stored in a
computer

conjunto
organizado de
información que
puede estar
guardado o no en
una computadora
1.Which of the following is not a part
of a database?
A.tables
B.records
C.fields
D.Worksheets
 3.Which of the following is not an
advantage of a computerized database?
A.the ability to enter information quickly
B.the ability to find information quickly
C.the ability to create worksheets
D.the ability to organize information in
different ways
2.In a database, a _____ is a unit of
information about one individual
or item.
A.table
B.field
C.record
D.file
4.What does the term GIGO stand for?
A.get in, get out
B.good information, good output
C.garbage in, garbage out
D.garbage input, garbage output
1-2
3-4
5.Which type of database allows
you to work with data in only one
table?
A.relational database
B.key-field database
C.flat-file database
D.organizational database

6.This kind of database can
be used to store all kinds of
items, such as documents or
video clips.
A.flat-file database
B.object-oriented database
C.multimedia database
D.none of the above

7._____ the same data in
multiple tables requires the
computer to store more
information and increases the
chance of errors.
A.Repeating
B.Avoiding
C.Formatting
D.Linking

8.This means finding data by
looking at all the records in a
database.
A.surfing
B.mining
C.peeking
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
B.descending
C.incremental
D.exponential

10.This is a user-created direction
that tells the database to find
specific records.
A.sort order
B.report template
C.query
D.field

11.A database is an organized
collection of information.
A.True
B.False

12.Databases typically store all their
data in one large table.
A.True
B.False
 13.A field’s data type determines
what kind of information can be
stored there.
A.True
B.False

14.A computerized database can
store millions of telephone numbers.
A.True
B.False

15.One disadvantage of
computerized databases is that
they limit your ability to arrange
information.
A.True
B.False
 16.The same features that make
databases efficient tools also
enable them to keep data secure.
A.True
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
B.False

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
B. False

19.If you sort a database’s
information chronologically, then
you are sorting letters and
symbols.
A.True
B.False

20.A query lets you speed up the
browsing process by finding
information that matches specific
criteria.
A.True
B.False

:)
:)

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

Tables A database has one or more tables, just as a file cabinet
may have one or more drawers. Each table contains a collection
of related data. Although databases can store data in one large
table, it is more typical to divide databases into smaller tables.
For example, your school’s database might contain separate
tables for students and for teachers and staff.
Records The data in each table is further split into smaller units
that contain related information about one individual or item.
Each of these units is called a record. For your school’s database,
each unit of information, or record, is about an individual
student or teacher.
Fields Each separate piece of data that is stored in a record—a
student’s last name, first name, and so on—is called a field. Each
field is set up so that only a certain type of information, called
the data type, is permitted in that field. For example, a field for
date of birth allows only dates to be entered.

What makes up a database?
How is it organized? Picture
a file cabinet. One drawer
might hold information on a
company’s customers, and
another might have data on
the company’s products.
Within each drawer are
folders. Each folder is
dedicated to a particular
person or product. Finally,
each folder stores different
bits of information about
that person or product

A computerized database is
also structured in three
parts:

tables

records

fields



While smaller databases might
just as easily be kept on paper
as on a computer, computerized
databases make it easier to do
the following:
Enter Information You can
enter information neatly, quickly,
and in an organized way with
your keyboard and mouse.
Store Large Amounts of
Information If you want to keep
track of 20 or 30 phone
numbers, you can easily use an
address book. A computerized
database, however, can hold
thousands, or even millions, of
telephone numbers.
Tutorials



Find Information Quickly A computerized database
can save you time in finding information. It might
take you only a minute or two to find a number in
your personal address book, but a telephone
directory on CD-ROM can help you find one of
millions of phone numbers in even less time.
Organize Information in Different Ways Paper
filing systems can limit your ability to arrange
information. For example, should you organize
your personal phone book by listing each person’s
phone number, cell phone number, or e-mail
address first? With a computerized database, you
can easily switch between these different methods.
Update Information Database software makes it
easy to change or update data. Think about adding
a new name to your address book. It would be
difficult to re-alphabetize the list if it existed only
on paper. Think about how messy the book might
look after just a few changes. With a computerized
database, names and numbers can be added,
deleted, or changed easily and quickly. After
making these changes, you have an easy-to-read,
updated version of the database.
Tutorials

Databases can be useful tools
at home and at work. They
also have many different uses
at school. Administrators can
use them to track student
performance, payroll, and
supplies. Teachers can use
them to record students’ test
scores and attendance.
Students can use them to
organize their grades or search
for information for a project.



However, databases are useful
only if they are accurate. In
other words, databases are
only as good as the data they
contain. The acronym GIGO
explains this principle. GIGO is
short for “garbage in, garbage
out.” It means that if the
information placed in a
database is wrong, anyone
using that information will get
the wrong results. When
adding information to a
database, it is very important
to do so accurately and to
check your entries.
Mr.Puente :thank you
very much for all
the support and
thank you
Mrs.Guerrero for
helping up out in
everything we need
!!! :)