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

Identify the right columns for joins


A data warehouse is a collection of objects such as databases, tables, users, and many others. Tables hold data which is used to drive business insights and analytics. To get answers to many business requirements, it becomes necessity to join multiple tables.

Not only is this type of join important, but it is also important which columns need to be joined. In this recipe, we will explore which types of columns are good candidates for joins. But sometimes, joining columns can't be changed because of business requirements.

The following are some data types that can be used in Teradata:

Data Type

Length (Bytes)

Description

ByteINT

1

Ranges from -127 to +127

CHAR

Fixed format

 These data types represent character data: Type Varchar, CLOB

DATE

4

Format YYYYYMMDD

TIME

6/8

Format Time or Timestamp value HHMMSS.nnnnnn or HHMMSS.nnnnnn+HHMM

ARRAY/VARRAY

Fixed format

User-defined type

BIGINT

8

Numeric data type

DECIMAL

1-16

Range from 1-38

 

Like other programming languages, Teradata SQL...