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Hadoop Beginner's Guide

You're reading from   Hadoop Beginner's Guide Get your mountain of data under control with Hadoop. This guide requires no prior knowledge of the software or cloud services ‚Äì just a willingness to learn the basics from this practical step-by-step tutorial.

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Product type Paperback
Published in Feb 2013
Publisher Packt
ISBN-13 9781849517300
Length 398 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (19) Chapters Close

Hadoop Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. What It's All About 2. Getting Hadoop Up and Running FREE CHAPTER 3. Understanding MapReduce 4. Developing MapReduce Programs 5. Advanced MapReduce Techniques 6. When Things Break 7. Keeping Things Running 8. A Relational View on Data with Hive 9. Working with Relational Databases 10. Data Collection with Flume 11. Where to Go Next Pop Quiz Answers Index

Time for action – creating a table for the UFO data


Perform the following steps to create a table for the UFO data:

  1. Start the Hive interactive shell:

    $ hive
    
  2. Create a table for the UFO data set, splitting the statement across multiple lines for easy readability:

    hive> CREATE TABLE ufodata(sighted STRING, reported STRING, sighting_location STRING,    > shape STRING, duration STRING, 
    description STRING COMMENT 'Free text description')

    COMMENT 'The UFO data set.' ;
    

    You should see the following lines once you are done:

    OK
    Time taken: 0.238 seconds
    
  3. List all existing tables:

    hive> show tables;
    

    You will receive the following output:

    OK
    ufodata
    Time taken: 0.156 seconds
    
  4. Show tables matching a regular expression:

    hive> show tables '.*data';
    

    You will receive the following output:

    OK
    ufodata
    Time taken: 0.065 seconds
    
  5. Validate the table specification:

    hive> describe ufodata;
    

    You will receive the following output:

    OK
    sighted  string  
    reported  string  
    sighting_location  string  
    shape...
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