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

Handling file and folder operations: File System Task


Although systems have evolved greatly in terms of technology, communications, and security, data access to source systems is often achieved through flat files. The people responsible for "Operational Systems" (OS) do not like applications that they don't fully understand pulling unknown volumes of data at unknown times from their systems. Even when someone tries to change this, they always get the same reaction: "I'm not letting you alter my system with something I don't know!" They prefer to stay in control and make data sources available in flat files on some 'staging area', in spite of directly opening the OS 'doors'. Therefore, reading text files and subsequent treatment, is a widely used practice mainly in a Data Warehousing scenario known as the PUSH model. In this approach, the OS starts data extraction to an external repository (usually known as a staging area) that will be accessed by an ETL Process.

To handle these file and folder...