 
Summary: March 23, 2008 DB:Relational Algebra 1
Relational Algebra
March 23, 2008 DB:Relational Algebra 2
Objectives
Introduction to Relational Algebra +
Relational Algebra Operations +
Summary +
Example Queries +
March 23, 2008 DB:Relational Algebra 3
 Introduction To Relational Algebra ...
Relational algebra is a set of operations that enable the
user to specify basic retrieval requests. Each operation
produces results which is a relation.
Relational algebra expression is a sequence of relational
algebra operations whose result will also be a relation.
There are two groups of relational algebra operations:
Operations developed specifically for relational database, such
as SELECT, PROJECT, and JOIN.
Operations from mathematical set theory, such as UNION, SET
DIFFERENCE, INTERSECTION, CARTESIAN PRODUCT, and
