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CSC408 CHAPTER 5 - Coggle Diagram
CSC408 CHAPTER 5
( 1 ) FILE ORGANIZATION TERMS AND CONCEPT
DATABASE
GROUP OF RELATED FIELDS
GROUP OF CHARACTERS (WORDS OR NUMBERS
ENTITI ; CUSTOMER
ATTRIBUTES
CUSTOMER ID
NAME
PHONE NO
FILE
GROUP OF RELATED FILES
RECORD
GROUP OF RECORD OF SAME TYPE
FIELD
GROUP OF RELATED FIELDS
GROUP OF CHARACTERS AS WORD(S) OR NUMBER
DESCRIBE ENTITY
PERSON
WHICH WE STORE INFORMATION
PLACE
THING
ATTRIBUTES
EACH CHARACTERISTIC/QUALITY
DESCRIBING
ENTITY
( 2 ) A COMPUTER SYSTEM
ORGANIZES DATA
IN HIERARCHY THAT STARTS WITH
BIT
( WHICH REPRESENTS EITHER 0 OR 1
BIT CAN BE GROUP TO FORM A BYTE
BYTES CAN BE GROUP TO FORM A FIELD
RELATED FIELDS CAN BE GROUP TO FORM A RECORD
RELATED RECORDS CAN BE COLLECTED TO FORM A FILE
RELATED FILES CAN BE ORGANIZED INTO
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EXAMPLE
STUDENT DATABASE
COURSE FILE
FINANCIAL FILE
PERSONAL FILE
FILE
STUDENT ID
COURSE
DATE
GRADE
RECORD
STUDENT ID
COURSE
DATA
GRADE
FIELD
IS 101 (COURSE FIELD)
BYTE
0100 1001 (LETTER IN ACII)
BIT = 0
(3) PROBLEMS WITH TRADITIONAL FILE ENVIRONMENT
THE USE OF TRADITIONAL APPROACH
TO FILE PROCESSING
ENCOURAGE
EACH FUNCTIONAL AREA IN A COOPERATION
TO DEVELOP
SPECIALIZED APPLICATIONS
EACH APPLICATION REQUIRES
A UNIQUE DATA FILE
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