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Author Question: Explain First Normal Form and provide examples. What will be an ideal ... (Read 309 times)

Tirant22

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on: Jul 7, 2018
Explain First Normal Form and provide examples.
 
  What will be an ideal response?

Question 2

The symbol X(8 ) represents:
 
  A) eight digits.
  B) eight alphanumeric characters.
  C) a data structure or element that repeats eight times.
  D) an element that is found within eight data structures.


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soda0602

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Reply #1 on: Jul 7, 2018
Answer to Question 1

The First Normal Form removes repeating groups and arrays. If a column in a Customer table, for example, contained multiple phone numbers, that would be an array. If it contained multiple columns named something like Phone1, Phone2, etc., that would be a repeating group. To make the table conform to First Normal Form the phone numbers should be placed in another entity with a relation to the Customer entity.

Answer to Question 2

B


Tirant22

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Reply 2 on: Jul 7, 2018
Gracias!

olderstudent

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Reply 3 on: Yesterday
Wow, this really help

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