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2 years ago

15

Identify the correctly constructed ALTER TABLE statement to add a UNIQUE constraint to the column customer_number with the const

raint name customer_number_unique on the table called 'customer'.

Computers and Technology

1 answer:

SVEN [57.7K]2 years ago

5 0

ALTER TABLE customer ADD CONSTRAINT customer_number_unique UNIQUE (customer_number);

You might be interested in

What is the minimum number of bits needed to store the decimal value 200?

Nesterboy [21]

Answer:

8 bits

Explanation:

Given

Decimal Value = 200

Required

Determine minimum number of bits to store the value

Represent the decimal value with N and the number of bits with n

The relationship between n and N is:

$2^n = N$

Substitute 200 for N

$2^n = 200$

Take Log of both sides

$Log2^n = Log200$

Apply law of indices

$nLog2 = Log200$

Make n the subject

$n = \frac{Log200}{Log2}$

$n = 7.64385618977$

We need n to be an integer; So, we have to approximate

$n = 8$

4 0

3 years ago

What is the term for a set of actions carried out on inputs?

Ymorist [56]

Answer:

<u><em>Input Bindings</em></u> is the term that is used for actions carried out on inputs in automation process.

Explanation:

In Automation process different operation or tasks had been performed such as output, input, internal actions. These are known as action bindings.

At input terminal the actions that are being carried out are called Input bindings. A command is comes from control pin and data is comes from input pin. This input and control signal combines together and perform the action that is required by machine or device.

<em>This is the reason these actions performed at input device is called Input Binding.</em>

8 0

4 years ago

Size of a request header field exceeds server limit.

garri49 [273]

Try to Increase the value for the directive LimitRequestFieldSize in the httpd.conf:

Reason: This is normally caused by having a very large Cookie, so a request header field exceeded the limit set for Web Server.
For IBM® HTTP Server, this limit is set by LimitRequestFieldSize directive (default 8K). The LimitRequestFieldSize directive allows the Web server administrator to reduce or increase the limit on the allowed size of an HTTP request header field.
SPNEGO authentication headers can be up to 12392 bytes. This directive gives the server administrator greater control over abnormal client request behavior, which may be useful for avoiding some forms of denial-of-service attacks.

8 0

3 years ago

Write a class named Car that has the following data attributes:

meriva

ANSWER

The program in JAVA for the given scenario is as follows.

import java.util.*;

public class Car

{

// variables declaration

static int _year_model;

static String _make;

static int _speed;

public static void _init_( int model, String m )

{

// variables initialization

_year_model = model;

_make = m;

_speed = 0;

}

public static void accelerate()

{

_speed = _speed + 5;

}

public static void brake()

{

_speed = _speed - 5;

}

public static int get_speed()

{

// current value of speed is returned

return _speed;

}

public static void main(String[] args) {

// object of class created

Car ob = new Car();

// method called using object of class

ob._init_(2019, "audi");

ob.accelerate();

System.out.println("Accelerated speed " + ob.get_speed());

ob.accelerate();

System.out.println("Accelerated speed " + ob.get_speed());

ob.accelerate();

System.out.println("Accelerated speed " + ob.get_speed());

ob.accelerate();

System.out.println("Accelerated speed " + ob.get_speed());

ob.accelerate();

System.out.println("Accelerated speed " + ob.get_speed());

System.out.println();

ob.brake();

System.out.println("Speed after brake " + ob.get_speed());

ob.brake();

System.out.println("Speed after brake " + ob.get_speed());

ob.brake();

System.out.println("Speed after brake " + ob.get_speed());

ob.brake();

System.out.println("Speed after brake " + ob.get_speed());

ob.brake();

System.out.println("Speed after brake " + ob.get_speed());

}

}

OUTPUT

Accelerated speed 5

Accelerated speed 10

Accelerated speed 15

Accelerated speed 20

Accelerated speed 25

Speed after brake 20

Speed after brake 15

Speed after brake 10

Speed after brake 5

Speed after brake 0

EXPLANATION

1. Variables are declared with String and integer datatypes.

2. _init_() initializes all the variables. This method is also called inside main() using object of Car class in order to initialize the variable speed to 0.

3. Inside main(), object of Car class created.

Car ob = new Car();

4. All the methods are called using object of the class.

ob._init_(2019, "audi");

ob.accelerate();

ob.brake();

5. All the variables are declared as static.

6. All the methods are declared as static since main() method is static inside which all other methods are called.

7. New line is included to improve readability of the output.

7 0

4 years ago

Why is John Von Neumann to a remarkable name?<br>si

Black_prince [1.1K]

Answer:

John von Neumann is remarkable for his vast knowledge of mathematics, and the sciences as well as his ability to correlate the pure and applied sciences.

Explanation:

John von Neumann who was born on December 28 1903, and died on February 8,1957 was known for his extensive knowledge of mathematics, physics, computer, economics, and statistics. In computing, he was known to conceive the idea of the self-replicating machines that thrive in the automata cellular environment, the von Neumann architecture, stochastic computing and linear programming.

He developed the game theory in Economics, and laid the foundation for several mathematical theories. He contributed greatly to quantum mechanics and quantum physics. Little wonder, he was dubbed "the last representative of the great mathematicians."

8 0

3 years ago