Transcript
OPEN OFFICE.ORG BASE BY-RITESH DANSENA
What is Database ?
A database is a collection
Of logically related data
REDUNDANCY
Duplication of data iscalled data redundancy
Advantages of Database•Reduced Data redundancy•Controlled data inconsistency•Data sharing•Enforcement of standards•Enhanced data
What is Database Management System ?
Database Management System(DBMS)Is a computer program that manages A databse effectively and efficiently.
SOME POPULAR DBMSs
•Microsoft Access•Base of OpenOffic.org•MySQL•Oracle
FEATURES OF BASE•Tables•Queries•Forms•Reports
TABLE
A Table refers to a storageData pertaining to single
Object, subject or purpose.
QUERY
A Query is a statement that gives you filterred data according to your
conditions and specifications.
FORM
A Form is an interface in
user specified layout that
lets users view, enter, change Data directly
in the table.
REPORT
A Report is an effective way to present data in aprinted format. It is a
formal, presentable printeddocument that lists data in
a formatted manner.
STARTING Ooo BASETo start BASE, you may follow these steps :
From the applications menu, Select Office OpenOffice.org
Base
FRONT PAGE OF OPENOFFICE.ORG BASE
CREATING A NEW DATABASECreating a new databaseTo create a new database, click the arrow next to the New icon. In the drop-down menu, select Database(Figure 1). This opens the Database Wizard. You can also open the Database Wizard using File > New >Database.
CREATING DATABASE TABLESTo work with tables, click the Tables icon inthe Database list, or use Alt+a. The threetasks that you can perform on a table arein the Tasklist (see Figure 2).
USING THE WIZARD TO CREATE A TABLE
Step 1: Select fields.Step 2: Set field types and formats.Step 3: Set primary key.Step 4: Create the table.
BASE window componentWhen we see a BASE window, there are variouscomponents that may be used for a variety of tasks.
These components are :1.Title Bar2.Menu Bar3.Toolbar4.Database Windows5.Object Buttons6.Status Bar
FIELD
A field is a data element whichcan store one type of informationwhich is composed of characters.
TYPES OF FIELD
•Fixed length Fields•Variable length Fields
FIXED LENGTH FIELDS
Fixed length fields have fixed lengths i.e., they occupy fixed
number of bytes for every data element they store.
VARIABLE LENGTH FEILDSVariable length fields
have verified field lengths i.e., field length is determined separately foe every data element
inside the field.
Categories of Fixed length fields
Text data typesDate/Time data types Numeral data typesSpecial data types
1.TEXT DATA TYPES
Text (fix) [CHAR]Text [VARCHAR]Text [VARCHAR-IGNORECASE]Memo v[LONGVARCHAR]
2.DATE/TIME Data types
Date [DATE]Time [TIME]Date/Time [TIMESTAMP]
3.NUMERAL DATA TYPES
Whole-Number data typesFractional values data types
WHOLE-NUMBER DATA TYPES
Tiny Integer[TONYINT]Small Integer[SMALLINT]Integer[INT]Big Integer[BIGINT]
FRACTIONAL VALUE DATA TYPES
Float[FLOAT]Real[REAL]Double[DOUBLE]Numeric[NUMERIC]Decimal[DECIMAL]
4.SPECIAL DATA TYPESYes/No[BOOLEAN]Image[LONGVARBINARY]Binary[VARBINARY]Binary(fix)[BINARY]Other[OTHER]
FIELD PROPERTIESEntry RequiredLengthDecimal valueDefault Value
ENTRY REQUIRED field property
This property ensures that data cannot be skipped in the field for which this property
is set to Yes.
LENGTH field property
This property determines the maximum length the data can
have in this field. The data inthe field cannot exceed this limit.
DECIMAL PLACES FIELD PROPERTY
This property specifies thenumber of decimal places
permitted in this field.
DEFAULT VALUE FIELD PROPERTY
The default value is used tospecify the default value for
a field or control.
THANKYOU
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