Author Question: When building an information system, we first create a ________ model of the system, from which we ... (Read 150 times)

captainjonesify · **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?

cpetit11 · **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.