Pig & Hive in Hadoop

Pig – is an Apache open-source project and one of the components of the Hadoop eco-system.
Pig – is a high-level data flow scripting language and runs on the Hadoopclusters.
Pig – uses HDFS for storing and retrieving data and Hadoop MapReduce for processing Big Data.

Hive – is a data warehouse system for Hadoop.
Hive – facilitates ad hoc queries and aids analysis of data sets stored in Hadoop.
Hive – provides an SQL like language called HiveQL(HQL)