Part: Tasks

Define property Functional Dependencyl

List the Armstrons axloms and state the bellow statement!

$\{xY,Z-W\}+\{xZ-Wr\}1$

$(6$ points$)$

Using your own simple examples and suitable diagrams, explain and discuss its properties of

the following Relational Algebra operators. For full marks, you must then supply an example

SQL statement of how that concept is implemented.

a$.$ PROJECTION

b$.$ THETA$-$JOIN

c$.$ INTERSECT

d$.$ SELECTION

e$.$ UNION

Each item is equally weighted.