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№1 слайд![Lecture. Introduction](/documents_5/afffa0b2657f9491aa51ca2092b036db/img0.jpg)
Содержание слайда: Lecture.1 Introduction
National Aviation University
Computer Sciences Faculty
Department of software engineering
№2 слайд![CONTENTS File systems and](/documents_5/afffa0b2657f9491aa51ca2092b036db/img1.jpg)
Содержание слайда: CONTENTS
File systems and data bases
Definitions of DB and DBMS
Advantages of DB usage
DBMS languages
DBMS users
Basic requirements to database systems
№3 слайд![File Systems](/documents_5/afffa0b2657f9491aa51ca2092b036db/img2.jpg)
Содержание слайда: File Systems
№4 слайд![File System Drawbacks Data](/documents_5/afffa0b2657f9491aa51ca2092b036db/img3.jpg)
Содержание слайда: File System Drawbacks
Data depends on programs
Inflexibility of data structure
Static data
Absence of integration
Data inconsistency
Inefficient concurrent access
Inefficient storage and processing
№5 слайд![Data Base Approach](/documents_5/afffa0b2657f9491aa51ca2092b036db/img4.jpg)
Содержание слайда: Data Base Approach
№6 слайд![Data Base Definition](/documents_5/afffa0b2657f9491aa51ca2092b036db/img5.jpg)
Содержание слайда: Data Base Definition
№7 слайд![DBMS Definition](/documents_5/afffa0b2657f9491aa51ca2092b036db/img6.jpg)
Содержание слайда: DBMS Definition
№8 слайд![DB Advantages Integrated data](/documents_5/afffa0b2657f9491aa51ca2092b036db/img7.jpg)
Содержание слайда: DB Advantages
Integrated data storage
Centralized management
Common usage (sharing)
Data independence
Data integrity
Data security
Effective data access management
Data recovery
№9 слайд![Centralized DB Management DB](/documents_5/afffa0b2657f9491aa51ca2092b036db/img8.jpg)
Содержание слайда: Centralized DB Management
DB schema design
Development data storage structures
DB restructuring and reorganization
Supporting DB back-up and recovery
mechanisms
Data protection mechanisms
DB Adjustments
Regular observations
№10 слайд![Data Independence in DB](/documents_5/afffa0b2657f9491aa51ca2092b036db/img9.jpg)
Содержание слайда: Data Independence in DB
Logical independence
Physical independence
№11 слайд![Data integrity in DB The](/documents_5/afffa0b2657f9491aa51ca2092b036db/img10.jpg)
Содержание слайда: Data integrity in DB
The following causes integrity violation:
Faults in hardware or software
Incorrect data entering, modifications and
deletions
Concurrent data access and modifications
№12 слайд![Features of DB Integrity](/documents_5/afffa0b2657f9491aa51ca2092b036db/img11.jpg)
Содержание слайда: Features of DB Integrity Supporting
Back-up coping and restoring
Checkpoints and rollbacks
Integrity constraints
Transactions
Locking
Logs activity
№13 слайд![Data Security User](/documents_5/afffa0b2657f9491aa51ca2092b036db/img12.jpg)
Содержание слайда: Data Security
User registration
Control of access rights
User identification
Automatic logging
Data encryption
№14 слайд![DBMS Languages Data](/documents_5/afffa0b2657f9491aa51ca2092b036db/img13.jpg)
Содержание слайда: DBMS Languages
Data Definition language (DDL)
Data Manipulation Language (DML)
Query Language (QL)
№15 слайд![Data Base Users DB](/documents_5/afffa0b2657f9491aa51ca2092b036db/img14.jpg)
Содержание слайда: Data Base Users
DB administrator (group)
System analytics and designers
System and applied programmers
End users
Operators
№16 слайд![Requirements to DB Simplicity](/documents_5/afffa0b2657f9491aa51ca2092b036db/img15.jpg)
Содержание слайда: Requirements to DB (1)
Simplicity and flexibility of applications
development
Multiple-aspect data usage
Simplicity and flexibility of data usage
Simplicity and flexibility of data changes,
modifications and adjustemts
Efficiency, flexibility and productivity of storage
and processing
№17 слайд![Requirements to DB Protection](/documents_5/afffa0b2657f9491aa51ca2092b036db/img16.jpg)
Содержание слайда: Requirements to DB (2)
Protection against the non-authorized access,
distortion and deletion
Support of a required level of the data
independence
Support a required level of the data integrity
Advanced DB administration features