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Author Question: When building an information system, we first create a ________ model of the system, from which we ... (Read 151 times)

captainjonesify

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on: Jul 7, 2018
When building an information system, we first create a ________ model of the system, from which we will design the product,
 
  A) physical
  B) conceptual
  C) visionary
  D) stable

Question 2

Explain look up tables and their functions.
 
  What will be an ideal response?


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cpetit11

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

B

Answer to Question 2

A lookup table defines and, often, describes a set of valid values for a given attribute. Rows in a lookup table do not correspond to entities (or objects), but represent a range of values for a single attribute in another table, enforced through a foreign key. Lookup tables also can provide descriptions for categorical data items that are meaningless without descriptions. Optionally, they can be maintained by users.


captainjonesify

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Reply 2 on: Jul 7, 2018
Wow, this really help

Dinolord

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Reply 3 on: Yesterday
Gracias!

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