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nydimaria [60]
3 years ago
11

Draw an ERD for the following problem with attributes, primary keys, cardinalities and participation constraints and specializat

ion, if appropriate.
An information studies student wants to keep track of the following information. A publishers publishes two kinds of publications: books and journals. Any one publisher publishes at least one book and/or at least one journal. Each book can be written by one or more authors and one author can write one or more books. Each book and journal is characterized by one or more indexed keywords, which are represented by a keyword number and keyword. Not every keyword is used by the journals, however. Both books and journals have a unique number (such as ISBN# for a book and ISSN# for a journal), title and a publisher. For books, the student tracks the published year, all author information and their institutions. For journals, the student keeps the starting year first published, the number of issues to be published per year and the category of the journal (such as academic, newsletter, trade). Each publisher has name, address and phone.Each author has an ID number, name, address, phone, author's affiliated institution and the address of the institution. An author may be affiliated with more than one institution.The student would like to keep only authors who are participating in writing at least one book and institutions that have such authors.
Computers and Technology
1 answer:
9966 [12]3 years ago
7 0

Answer:

Following are the solution to the given question:

Explanation:

  • Ellipses are the attributes.
  • Rectangle entities are shown.
  • Rhombus is the relationship.
  • The double rectangle is the weak entity.
  • Is-A is a triangle relationship.

There has to be N: N between books and authors because one writer can write one or more books, and one or more writers can read each book.

The N: N eigenvalues also exist among authors or students as Authors who participate in the creation of one or more books and organizations with these writers will keep their tracking of them.

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Anarel [89]
True because i had heard my friend doing her homework and i was helping her study
4 0
3 years ago
You will need to complete the functions these functions: a. get_total This function takes in pennies, nickels, dimes, and quarte
tankabanditka [31]

Answer:

penny = int(input("Enter number of pennies: "))

nickel = int(input("Enter number of nickel: "))

dime = int(input("Enter number of dime: "))

quarter = int(input("Enter number of quarter: "))

def get_total(penny, nickel, dime, quarter):

   total = ((1 * penny) + (5 * nickel) + (10 * dime) + (25 * quarter))/ 100

   print (f"The total amount is {total}")

   

def get_dollars(penny, nickel, dime, quarter):

   dollar = ((1 * penny) + (5 * nickel) + (10 * dime) + (25 * quarter))// 100

   print (f"The dollar part is ${dollar}")

   

def get_left_over_cent(penny, nickel, dime, quarter):

   cent = ((1 * penny) + (5 * nickel) + (10 * dime) + (25 * quarter)) % 100

   print (f"The left over cent is {cent} cents")

 

   

get_total(penny, nickel, dime, quarter)

get_dollars(penny, nickel, dime, quarter)

get_left_over_cent(penny, nickel, dime, quarter)

Explanation:

In the United States, these coins have following values:

Quarter= 25 cents

Dime= 10 cents

Nickel= 5 cents

Penny= 1 cent

The first line collect an input from the user, convert to integer and assign to penny.

The second line collect an input from the user, convert to integer and assign to nickel.

The third line collect an input from the user, convert to integer and assign to dime.

The fourth line collect an input from the user, convert to integer and assign to quarter.

Based on the above definition of penny, nickel, dime and quarter; we defined the various function.

First the get_total function was defined and the total amount was calculated and assigned to total, then the total was output to the user.

Then, the get_dollars function was defined and the dollar part was calculated through dividing the total by 100. (100 cents = $1). The dollar was also output to the user.

Then, the get_left_over_cents function was defined and the cent was calculated by finding the remainder when the total is divided by 100 (cent = total % 100). The symbol "%" represent modulo and is used to find remainder of a division operation.

6 0
3 years ago
• Use variable to create the number 0 at location 0, 400.
pashok25 [27]

Answer: i thinks its

Explanation:

$('button')

 .html('Click me') // Try edit it...

 .on('click', () => console.log(''))

.on('click', () => console.log(''))

.on('click', () => console.log(''))

console.log('App started')

8 0
2 years ago
The position of a _____ is a nontechnical position responsible for defining and implementing consistent principles for setting d
Cloud [144]

Answer:

jf

Explanation:

nvfmnv

7 0
3 years ago
Where do you place the logical test argument in an IF function formula?
Inessa [10]

Answer:

The first argument listed after IF

Explanation:

When the two variables are listed next to each other, Excel will find and calculate the correlation between them.

8 0
3 years ago
Read 2 more answers
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