Book Image

Microsoft SQL Server 2012 Integration Services: An Expert Cookbook

Book Image

Microsoft SQL Server 2012 Integration Services: An Expert Cookbook

Overview of this book

SQL Server Integration Services (SSIS) is a leading tool in the data warehouse industry - used for performing extraction, transformation, and load operations. This book is aligned with the most common methodology associated with SSIS known as Extract Transform and Load (ETL); ETL is responsible for the extraction of data from several sources, their cleansing, customization, and loading into a central repository normally called Data Warehouse or Data Mart.Microsoft SQL Server 2012 Integration Services: An Expert Cookbook covers all the aspects of SSIS 2012 with lots of real-world scenarios to help readers understand usages of SSIS in every environment. Written by two SQL Server MVPs who have in-depth knowledge of SSIS having worked with it for many years.This book starts by creating simple data transfer packages with wizards and illustrates how to create more complex data transfer packages, troubleshoot packages, make robust SSIS packages, and how to boost the performance of data consolidation with SSIS. It then covers data flow transformations and advanced transformations for data cleansing, fuzzy and term extraction in detail. The book then dives deep into making a dynamic package with the help of expressions and variables, and performance tuning and consideration.
Table of Contents (23 chapters)
Microsoft SQL Server 2012 Integration Services: An Expert Cookbook
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

The Script Component as a Source


In the previous recipe we had a real-world example of using a Transformation Script Component. Using a Script Component can be more effective when it plays the role of a Source in Data Flow.

There are times when default built-in sources within Data Flow cannot open a special source—some sources may be very old or very rarely used, and there are no appropriate connection providers or sources for them. In some cases, they could be source structures in special formats that the built-in sources couldn't open correctly. In such scenarios, later in this chapter Script Component as a Source will help us to write custom code and fetch data from every source in the way we need.

In this recipe, we have a Flat File with special formatting (this file is generated in the output of the next recipe), so the built-in Flat File source couldn't open it as we require. We will use a Script Component as Source and create outputs as well.

The following screenshot is a sample of our...