Book Image

Expert Cube Development with SSAS Multidimensional Models

By : Alberto Ferrari, Marco Russon, Chris Webb
Book Image

Expert Cube Development with SSAS Multidimensional Models

By: Alberto Ferrari, Marco Russon, Chris Webb

Overview of this book

Table of Contents (19 chapters)
Expert Cube Development with SSAS Multidimensional Models
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Introduction to currency conversion


The need for currency conversion occurs when measure values have to be reported in a currency that is different from the one used to collect the data originally. It might seem as though this can be solved using a simple calculation; however, your assumptions might be wrong. Consider the following approach to currency conversion:

  • Collect currency exchange rates on a daily basis

  • Use daily exchange rates to convert each transaction into the desired currency

Why could this pattern be wrong? It might be correct in some cases, but it might be wrong for a variety of reasons. For example, the date used to link the exchange rate value to a transaction might not be the right one because the date of payment is not recorded in the transaction itself. In another example, if the payment has been made to a foreign currency bank account, the conversion to a different currency should be made using a fixed exchange rate instead of a daily changing exchange rate.

Therefore,...