Book Image

Teradata Cookbook

By : Abhinav Khandelwal, Viswanath Kasi, Rajsekhar Bhamidipati
Book Image

Teradata Cookbook

By: Abhinav Khandelwal, Viswanath Kasi, Rajsekhar Bhamidipati

Overview of this book

Teradata is an enterprise software company that develops and sells its eponymous relational database management system (RDBMS), which is considered to be a leading data warehousing solutions and provides data management solutions for analytics. This book will help you get all the practical information you need for the creation and implementation of your data warehousing solution using Teradata. The book begins with recipes on quickly setting up a development environment so you can work with different types of data structuring and manipulation function. You will tackle all problems related to efficient querying, stored procedure searching, and navigation techniques. Additionally, you’ll master various administrative tasks such as user and security management, workload management, high availability, performance tuning, and monitoring. This book is designed to take you through the best practices of performing the real daily tasks of a Teradata DBA, and will help you tackle any problem you might encounter in the process.
Table of Contents (19 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Shrinking your data size


With increases in data these days, maintaining space on your Teradata system has become important. Businesses now want to capture data of all sorts and want to store it for longer. With data comes insight. Data you might not be using now could become important tomorrow. 

This exponential growth in data has presented us with different kinds of problems in data warehouses. With space management and even disks becoming cheap, space is still a concern for businesses when it comes to money.

So, Teradata provides you with many options to manage your space. Compression of data without sacrificing performance; in Teradata you can compress data in the following ways:

  • Multi value compression, MVC: Software based
  • Algorithmic value compression, ALC: Software based
  • Block level compression, BLC: Hardware based

Multi value compression was introduced in TD5; other compression techniques were added with time.

Data you can compress includes:

  • Any numeric data type
  • Nulls, zeros, blanks
  • DATE
  • Fixed...