Book Image

Apache Hive Cookbook

Book Image

Apache Hive Cookbook

Overview of this book

Hive was developed by Facebook and later open sourced in Apache community. Hive provides SQL like interface to run queries on Big Data frameworks. Hive provides SQL like syntax also called as HiveQL that includes all SQL capabilities like analytical functions which are the need of the hour in today’s Big Data world. This book provides you easy installation steps with different types of metastores supported by Hive. This book has simple and easy to learn recipes for configuring Hive clients and services. You would also learn different Hive optimizations including Partitions and Bucketing. The book also covers the source code explanation of latest Hive version. Hive Query Language is being used by other frameworks including spark. Towards the end you will cover integration of Hive with these frameworks.
Table of Contents (19 chapters)
Apache Hive Cookbook
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Using a database schema


In this recipe, you will learn how to use a database in Hive.

Getting ready

The USE DATABASE command is used to switch to the database, or it sets the database as the working database. It is analogous to the one used in the other RDBMS. The general format of using a database is as follows:

USE (DATABASE|SCHEMA) database_name;

Where:

DATABASE|SCHEMA: These are the same thing. These words can be used interchangeably.

How to do it…

The following command sets the database as the working database:

Use database Hive_learning;