Chapter 9

The Multiple-Rows-per-Subject Data Mart

 

9.1 Introduction

9.2 Using Multiple-Rows-per-Subject Data Marts

9.3 Types of Multiple-Rows-per-Subject Data Marts

9.4 Multiple Observations per Time Period

9.5 Relationship to Other Data Mart Structures

 

9.1  Introduction

As we saw in Table 7.6 of Chapter 7 – Analysis Subjects and Multiple Observations, the multiple-rows-per-subject data mart can be created only if we have multiple observations per subject. We also identified the two reasons for the multiple observations, namely, repeated measurements over time and multiple observations because of hierarchical relationships.

A one-to-many relationship exists between the analysis subject entity and the entity of the multiple observations. ...

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