Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
All Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Newsletter Hub
Free Learning
Arrow right icon
timer SALE ENDS IN
0 Days
:
00 Hours
:
00 Minutes
:
00 Seconds
Arrow up icon
GO TO TOP
Apache Hive Cookbook

You're reading from   Apache Hive Cookbook

Arrow left icon
Product type Paperback
Published in Apr 2016
Publisher Packt
ISBN-13 9781782161080
Length 268 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Authors (3):
Arrow left icon
Hanish Bansal Hanish Bansal
Author Profile Icon Hanish Bansal
Hanish Bansal
Saurabh Chauhan Saurabh Chauhan
Author Profile Icon Saurabh Chauhan
Saurabh Chauhan
Shrey Mehrotra Shrey Mehrotra
Author Profile Icon Shrey Mehrotra
Shrey Mehrotra
Arrow right icon
View More author details
Toc

Table of Contents (19) Chapters Close

Apache Hive Cookbook
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
1. Developing Hive FREE CHAPTER 2. Services in Hive 3. Understanding the Hive Data Model 4. Hive Data Definition Language 5. Hive Data Manipulation Language 6. Hive Extensibility Features 7. Joins and Join Optimization 8. Statistics in Hive 9. Functions in Hive 10. Hive Tuning 11. Hive Security 12. Hive Integration with Other Frameworks Index

Windowing in Hive


Windowing in Hive allows an analyst to create a window of data to operate aggregation and other analytical functions, such as LEAD and LAG.

The windowing specification in HiveQL comprises:

  • Partition

  • Order by

  • Window frame

  • Source name for window definition

Let's look into each of these specifications in detail:

  • Partition specification: It includes a column reference from the table. It could not be any aggregation or other window specification.

  • Order specification: It comprises a combination of one or more columns. The ordering could be ASC or DESC, which by default is ASC.

    Handling NULLs: There is no support for Nulls first or last specification. In Hive, Nulls are returned first.

  • Window frame: A frame has a start boundary and an optional end boundary:

    • Frame type: Window frames could be any of the following types:

      • ROW

      • RANGE

  • Frame boundary: A frame is associated with a direction or an amount. A direction value could be PRECEDING or FOLLOWING and the amount could be an integer value or...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $15.99/month. Cancel anytime
Visually different images