Transcription of Introduction to database design - ITU
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Introduction to database design - ITU
Introduction to database design Introduction to database design 2 Some figures are borrowed from the ppt slides from the book used in the course, database systems by Kiefer, Bernstein, Lewis Copyright 2006 Pearson, Addison-Wesley, all rights reserved. KBL chapter 5 (pages 127-187) Rasmus Pagh Introduction to database design Today s lecture This week and next week we cover KBL Chapter 5: SQL and relational algebra. SQL and relational algebra are relational query languages. SQL is declarative: Describe what you want. Relational algebra is procedural: Describe how to get what you want. 3 Introduction to database design Relational algebra expression 4 (formatted as a tree) Introduction to database design Greek letters, runes?
Introduction to Database Design Relational algebra • Relations are considered a set of tuples, whose components have names. • Operators operate on 1 or 2 relations
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Introduction to Object-Oriented Databases, Database, Introduction to Object-Oriented Databases and Database Systems, Introduction, Database Systems, SYSTEMS SOLUTIONS, Introduction to Database Systems, Chapter 1: Introduction, Systems, AN INTRODUCTION TO RELATIONAL DATABASES, Lecture Notes in Computer Science