Book Image

Real Time Analytics with SAP Hana

By : Vinay Singh
Book Image

Real Time Analytics with SAP Hana

By: Vinay Singh

Overview of this book

SAP HANA is an in-memory database created by SAP. SAP HANA breaks traditional database barriers to simplify IT landscapes, eliminating data preparation, pre-aggregation, and tuning. SAP HANA and in-memory computing allow you to instantly access huge volumes of structured and unstructured data, including text data, from different sources. Starting with data modeling, this fast-paced guide shows you how to add a system to SAP HANA Studio, create a schema, packages, and delivery unit. Moving on, you’ll get an understanding of real-time replication via SLT and learn how to use SAP HANA Studio to perform this. We’ll also have a quick look at SAP Business Object DATA service and SAP Direct Extractor for Data Load. After that, you will learn to create HANA artifacts—Analytical Privileges and Calculation View. At the end of the book, we will explore the SMART DATA access option and AFL library, and finally deliver pre-packaged functionality that can be used to build information models faster and easier.
Table of Contents (16 chapters)
Real Time Analytics with SAP HANA
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

What is a decision table?


It is a table representing a complete set of conditional expressions where expressions are mutually exclusive in a predefined area. An example of a decision table is shown in the following figure:

Why use decision tables?

Decision tables in general have the following capabilities:

  • Powerful visualization

  • Compact and structured presentation

  • Easier error prevention

  • Avoidance of incompleteness and inconsistency

  • Modular knowledge organization

  • Ability to group related rules into a single table

  • Ability to combine the tables to achieve a decision

The same usage can be extended to SAP HANA as well:

  • We can use it to implement business rules

  • It can help bring business agility

  • To to create decision tables in sap HANA

  • Calculation view with decision table

A Decision table is a way of implementing business rules in SAP HANA. Having captured the operational decisions, they can be turned into code using the decision tables. Business rules are written on either master data (such as customers, vendor...