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

Partitioning tables column wise


Starting with Teradata 14.0, a new feature was introduced called Columnar. Using a partition primary index (PPI), Teradata partitions tables into rows. But now you can also partition tables column wise. 

Columnar provides you with this feature. You can now partition tables with a high number of columns into smaller tables. This not only reduces the I/O, but space too, by auto compressing column containers. Tables can be row partitioned plus column partitioned.

Advantages of using the Teradata Columnar can be the following:

  • Improved query performance
  • Reduced disk space
  • Reduced I/O
  • Ease of use

Please note there are certain features of Columnar that are not available in later versions of the database but are in Teradata 15.10:

  • Has the primary index (from version 15.10)
  • Has the primary AMP index (from version 15.10)
  • Joins index column-based partitions (previous version also)
  • NOPI table column-based partitions (previous version also)
  • No SET tables (previous version also)
  • No...