This topic contains a solution. Click here to go to the answer

Author Question: Explain what a null is and what some the implications of nulls are for databases. What will be an ... (Read 73 times)

Starlight

  • Hero Member
  • *****
  • Posts: 567
Explain what a null is and what some the implications of nulls are for databases.
 
  What will be an ideal response?

Question 2

A policy is a set of rules for how to do things.
 
  Indicate whether the statement is true or false



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ebonylittles

  • Sr. Member
  • ****
  • Posts: 318
Answer to Question 1

A null is the absence of a value. That means that it cannot be compared to other values. It also can't really be counted or included in calculations. Despite these facts, a null is often a better choice than a zero or an empty string, because it accurately reflects the unknown status of the value rather than substituting a value that may not be accurate and may effect calculations.

Answer to Question 2

TRUE




Starlight

  • Member
  • Posts: 567
Reply 2 on: Jul 7, 2018
Wow, this really help


abro1885

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Excellent

 

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

For a complete list of videos, visit our video library