Suppose a relational schema

$$

$($

w

$,$

x

$,$

y

$,$

z

$)$

R$($w$,$x$,$y$,$z$),$ and set of functional dependencies as follows:

$$

:

$\{$

x

$->$

w

$,$

w

z

$->$

x

y

$,$

y

$->$

w

x

z

$\}$

F:$\{$x$->$w$,$wz$->$xy$,$y$->$wxz$\}$

Find the canonical cover

$$

c

Fc $($Minimal set of functional dependencies$).$

Consider the relation

$$

$($

$$

$$

$$

$$

$$

$)$

R$($ABCDE$)$ with the following dependencies:

$$

$->$

$$

$,$

$$

$$

$->$

$$

$,$

$$

$$

$->$

$$

A$->$B$,$BC$->$E$,$ED$->$A

iSuppose a relational schema R$($w$\backslash$times yz$),$ and set of functional dependency as

following

F:$\{$x$-->$w$,$wz$->$xy$,$y$->$wxz$\}$

Find the canonical cover Fc $($Minimal set of functional dependency$).$

Consider the relation R$($ABCDE$)$ with following dependencies

A$->$B$,$BC$->$E$,$ and ED$->$A

iR

ii Suppose a relational schema R$($wxyz$),$ and set of functional dependency as

following

F:$\{$x$-->$w$,$wz$->$xy$,$y$->$wxz$\}$

Find the canonical cover Fc $($Minimal set of functional dependency$).$

Consider the relation R$($ABCDE$)$ with following dependencies

A$->$B$,$BC$->$E$,$ and ED$->$A

iR

ii