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3 years ago

a rule that states each foreign key value must match a primary key value in the other relation is called the

Computers and Technology

1 answer:

makvit [3.9K]3 years ago

3 0

Answer:

Referencial Integrity Contraint

Explanation:

The referential integrity constraint states that the customer ID i.e (CustID) in the Order table must match a valid CustID in the Customer table. Most relational databases have declarative referential integrity. That is to say, when the tables are created the referential integrity constraints are set up so as to maintain the quality of information.

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What will the following code print out: int numbers [] = {99, 87, . 66, 55, 101}; for (int i = 1; i < 4; i++) cout << n

forsale [732]

Answer:

87 66 55

Explanation:

Array is used o store the multiple values with same data type.

the array show a decimal value .66, i assume this is enter by mistake because option has no decimal value.

The index of the array is start from zero, it means the first element store in the array at position zero.

In the for loop the variable 'i' start from 1 not zero and it goes to i<4 means i=3.

So, it access the element from 2 to 4 because the index is position of element less than 1.

Therefore, 87 66 55 print.

5 0

3 years ago

How do you destroy data on hard drive?

Nataly_w [17]

You have to destroy the hard drive as it is like a memory for the computer so it can never be deleted

7 0

3 years ago

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Carlie was asked to review a software project for her company to determine specific deadlines. Which part of project management

Elis [28]

Answer:

Resources

Explanation:

Carlie certainly requires to review the resources. It is important to find out how many software engineers, testers, etc. are available. And only then Carlie can find out the exact deadlines as required here. And hence, she must have look at the resources while determining the specific deadlines. Hence, resources are the correct option.

3 0

3 years ago

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7. Explain the steps for formatting a shape ?

alisha [4.7K]

Answer:

To begin, select the shapes you want to format. To select more than one, press and hold the Shift key. When you select one or more shapes, a new Drawing Tools tab appears. Here, you can select Shape Fill to fill the selected shapes with a solid color, gradient, texture, or picture.

Explanation:

3 0

3 years ago

Write a Python 3 program to read from a .csv file containing rates from power companies. Your program should determine the avera

aliya0001 [1]

Answer:

In python:

file = open("rates.csv", "r")

ratecount = 0

ratesum = 0

mylist = []

rates = file.readlines()

for nums in rates:

num = nums.rstrip('\n')

mylist.append(int(num))

for i in num:

ratesum= ratesum + int(i)

ratecount = ratecount + 1

print("Maximum Rate: "+str(max(mylist)))

print("Minimum Rate: "+str(min(mylist)))

print("Average Rate: "+str(ratesum/ratecount))

Explanation:

This opens the csv file

file = open("rates.csv", "r")

This initializes the number of rates in the file

ratecount = 0

This initializes the sum of the rates

ratesum = 0

This initializes an empty list

mylist = []

This reads the rates into lines

rates = file.readlines()

This iterates through the rates (as a string)

for nums in rates:

This removes the newline character \n in the rates

num = nums.rstrip('\n')

This appends the rates (as an integer) to the empty list

mylist.append(int(num))

The following counts the rates in the file and also sum them up

for i in num:

ratesum= ratesum + int(i)

ratecount = ratecount + 1

This prints the maximum of the rates

print("Maximum Rate: "+str(max(mylist)))

This prints the minimum of the rates

print("Minimum Rate: "+str(min(mylist)))

This calculates and prints the average rate

print("Average Rate: "+str(ratesum/ratecount))

6 0

3 years ago