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There is a central fact table and 4 dimensions – Time, A, B and C. The ratio m: n between 2 attributes of the hierarchy represents that for every ‘m’ occurrence of a parent element there will be a maximum of ‘n’ children. As per the current state, this fact table contains 1.  3 Years 2.  4 A1s 3.  5 B1s 4.  5 C1s Q1: What is the maximum possible fact data volume in terms of record/row count? Answer:

There is a central fact table and 4 dimensions – Time, A, B and C. The ratio m: n between 2 attributes of the hierarchy represents that for every ‘m’ occurrence of a parent element there will be a maximum of ‘n’ children. As per the current state, this fact table contains 1.  3 Years 2.  4 A1s 3.  5 B1s 4.  5 C1s Q1: What is the maximum possible fact data volume in terms of record/row count? Answer:

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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There is a central fact table and 4 dimensions – Time, A, B and C. The ratio m: n between 2 attributes of the hierarchy represents that for every ‘m’ occurrence of a parent element there will be a maximum of ‘n’ children.

As per the current state, this fact table contains
1.  3 Years
2.  4 A1s
3.  5 B1s
4.  5 C1s

Q1: What is the maximum possible fact data volume in terms of record/row count?

Answer:

Q2: The m:n ratio from attribute B3 to attribute B4 is changed from 1:3 to 1:1 due to some organizational changes. By how many times the maximum possible fact data volume (by record count) decreases?

Answer:

 

Please answer below questions based on this dimensional model and additional information provided Time В Year B1 1:4 1:4 Quarter B2 1:3 1:2 Month вз 1:3 B4 Month АЗ В4 C5 C5 Measure 1 1:6 Measure 2 АЗ C4 Measure 3 1:5 A2 1:27 C3 1:3 1:6 A1 C2 1:6 А C1
Transcribed Image Text:Please answer below questions based on this dimensional model and additional information provided Time В Year B1 1:4 1:4 Quarter B2 1:3 1:2 Month вз 1:3 B4 Month АЗ В4 C5 C5 Measure 1 1:6 Measure 2 АЗ C4 Measure 3 1:5 A2 1:27 C3 1:3 1:6 A1 C2 1:6 А C1
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