Content

Introduction ..................................................... ........................................................ ....................4
1 Database management systems……………………….……………………….7
1.1 Basic concepts of network database architecture .............................................. 12
1.2 Processing of distributed data……………………………………...15
1.3 Data protection means in the database……….……………………….……......24
2 Architecture of network databases ..............................................29
2.1 Network structures………………………………………………………..31
2.2 Relational structures…………………………………………………….34
2.3 Object-oriented DBMS…………………………………………37
2.4 Types of network databases…………………………………………………….40
3 Designing a network database…………………….………........................43
3.1 SQL database management language……………………………………46
3.2 Security of network databases…………………………………….48
3.3 Use of transaction…….…………………………………... ……….50
Conclusion………………………………………………………………………………53
Glossary………………………………………………………………………………………….. 56
List of sources used………………………………………………………59
List of abbreviations………………………………………………………………………………….62
Appendix A SQL Operators…………………………………………………………..63
Appendix B Structure of a hierarchical and network DBMS…………………………64