Download e-book for iPad: Apache Hive Essentials by Dayong Du

By Dayong Du

ISBN-10: 1783558571

ISBN-13: 9781783558575

Immerse your self on a beautiful trip to find the attributes of huge facts through the use of Hive

About This Book

  • Discover how Hive can coexist and paintings with different instruments within the Hadoop environment to create monstrous facts solutions
  • Grasp the talents wanted, research the easiest practices, and keep away from the pitfalls in writing effective Hive queries to investigate the large data
  • Create an atmosphere to investigate colossal information utilizing useful, example-oriented scenarios

Who This ebook Is For

If you're a information analyst, developer, or just anyone who desires to use Hive to discover and learn facts in Hadoop, this is often the ebook for you. no matter if you're new to special facts or a professional, with this e-book, it is possible for you to to grasp either the fundamental and the complex gains of Hive. due to the fact that Hive is an SQL-like language, a few past adventure with the SQL language and databases comes in handy to have a greater knowing of this book.

What you are going to Learn

  • Create and organize the Hive environment
  • Discover how one can use Hive's definition language to explain data
  • Discover attention-grabbing info through becoming a member of and filtering datasets in Hive
  • Transform info by utilizing Hive sorting, ordering, and functions
  • Aggregate and pattern facts in several ways
  • Boost Hive question functionality and improve info safety in Hive
  • Customize Hive for your wishes by utilizing user-defined features and combine it with different tools

In Detail

In this e-book, we arrange you on your trip into significant information through to start with introducing you to backgrounds within the gigantic information area besides the method of developing and getting accustomed to your Hive operating atmosphere. subsequent, the ebook courses you thru researching and reworking the values of massive facts with assistance from examples. It additionally hones your ability in utilizing the Hive language in a good demeanour. in the direction of the tip, the ebook makes a speciality of complicated themes reminiscent of functionality, safeguard, and extensions in Hive, so that it will consultant you on interesting adventures in this valuable tremendous facts journey.

By the top of the publication, you may be conversant in Hive and ready to paintings successfully to discover recommendations to special information problems.

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PacktLib is Packt's online digital book library. Here, you can search, access, and read Packt's entire library of books. Why subscribe? com, you can use this to access PacktLib today and view 9 entirely free books. Simply use your login credentials for immediate access. I dedicate this book to my daughter Preface With an increasing interest in big data analysis, Hive over Hadoop becomes a cutting-edge data solution for storing, computing, and analyzing big data. The SQL-like syntax makes Hive easier to learn and popularly accepted as a standard for interactive SQL queries over big data.

Apple="gala". {"apple":"gala","weight kg":1} UNION This is a structure that has exactly any one of the specified data types. 0. It is not commonly used. {2:["apple","orange"]} Note For MAP, the type of keys and values are unified. However, STRUCT is more flexible. STRUCT is more like a table whereas MAP is more like an ARRAY with a customized index. The following is a short practice for all the commonly used Hive types. The details of the CREATE, LOAD, and SELECT statements will be described later.

Hive CLI shows the exact line and position of the Hive query or syntax errors when the query has multiple lines. However, Beeline processes the multiple-line query as a single line, so only the position is shown for query or syntax errors with the line number as 1 for all instances. For this aspect, Hive CLI is more convenient than Beeline for debugging the Hive query. In both Hive CLI and Beeline, using the up and down arrow keys can retrieve up to 10,000 previous commands. history command can be used in Beeline to show all history.

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Apache Hive Essentials by Dayong Du


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