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

Solving insert performance


Insert comes under  data manipulation language. Insert means to place a new row into a table, which could be a duplicate or unique in itself.

The basic syntax of insert goes like this:

INSERT INTO table_name [(col_name [, ..., col_name])]
VALUES (expression [, ..., expression]);

A variation called INSERT SELECT takes data from an already populated table and inserts it into another one:

INSERT INTO table_name [(col_name [, ..., col_name])] SELECT statement;

Getting ready

To complete this recipe, you will need to connect to the Teradata database instance and open SQLA. 

How to do it...

Insert is the topmost SQL statement that executes on the system. With a little tweak, we can optimize it to get better performance:

  1. Create a source table:
/**Source Table**/
CREATE SET TABLE TEST01.web_clicks
  (Web_page_Number INTEGER,   
   Location_Number INTEGER,
   Amount DECIMAL(10,2))
UNIQUE PRIMARY INDEX ( Web_page_Number );
  1. Create a target table with the same PI as the source table:
...