Database - Relational Database

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Uploaded: 17.12.2007
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TABLE OF CONTENTS

Введение………………………………………..……………….….……........3
1 DEFINITIONS AND DB database ..................................... ... .5
1.1 Data and computer ...................... .... .................................. ......... ... 5
........................... 1.2 database architecture. ................................. .... 6
1.3 Data Model .................................. ........................... .. ... .... 8
1.4 file management system .... .................................... .. ... ... ... .9
2 relational database ............................................. 13
2.1 Relational data model .............................................. ... ... 14
2.2 Twelve rules Codd ................................................... 14 .....
Table 2.3 ........................................................................... ..18
2.4 relational data structure ............................................. .... 20
2.5 The primary and foreign keys ................................................ ... 22
2.6 Manipulation of relational data .............................. ... 23
Conclusion .............................................................................. 25
Bibliographic list ......................................................... .26
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