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 70 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
Great answer, keep it coming :)


CAPTAINAMERICA

  • Member
  • Posts: 325
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

For a complete list of videos, visit our video library