Final answer:
The Hadoop application that offers an SQL-like interface for data abstraction in a Hadoop datastore is Apache Hive. Hive uses HiveQL for querying semi-structured datasets, which provides a familiar SQL-like syntax for data analysts.
Step-by-step explanation:
The Apache Hadoop application that provides an SQL-like interface to allow abstraction of data on semi-structured data in a Hadoop datastore is Hive. Hive allows users to write queries using HiveQL, which is similar to SQL, making it easier for people familiar with SQL to run queries on large datasets stored in Hadoop's distributed file system. For example, you could use Hive to query a dataset of web server logs to analyze traffic patterns. Unlike SQL databases that store data in rows and columns, Hive allows for the querying of data that is not structured in a traditional sense, such as JSON or XML files.