Apache Drill is an open source Schema-free SQL Query Engine for Hadoop, NoSQL and Cloud Storage. It gives faster insights without the overhead (data loading, schema creation and maintenance, transformations, etc.) . It allows you to analyze the multi-structured and nested data in non-relational datastores directly without transforming or restricting the data. It also lets you leverage your existing SQL skillsets and BI tools including Tableau, Qlikview, MicroStrategy, Spotfire, Excel and more.