Question: Consider the following two relations: 1 . Identify 2 super keys of the relation Author. 2 . Identify all candidate keys of the relation Author.

Consider the following two relations:

1 .

Identify

2

super keys of the relation Author.

2 .

Identify all candidate keys of the relation Author.

3 .

Identify

2

super keys of the relation Publishing

4 .

Identify one foreign key in the relation Publishing

5 .

Identify all candidate keys of the relation Publishing.

6 .

Insert into Author

'5',

'Mark;'Doe'

>

valid

/

not valid?

7 .

Insert into Publishing

2,

'Database Concepts',

2, 2020 .

'Science'

>

valid

/

not valid?

8 .

Insert into Publishing

7,

'Networking',

5, 2020,

'Science'

>

valid

/

not valid?

9 .

Update book with bookID

= 4

set LastName

=

NULL. valid

/

not valid?

10 .

Update Publishing where bookID

\ (= 2 \)

set

\ (

A u t h o r I D

=

N U L L

\)

valid

/

not valid?

Consider the following two relations: 1 .

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