This is a performance testing framework for Spark SQL in Apache Spark 2.2+. The framework contains twelve benchmarks that can be executed in local mode. They are organized into three classes and ...

Abstract: Problem solving, worked examples, and erroneous examples have proven to be effective learning activities in Intelligent Tutoring Systems (ITSs). However, it is generally unknown how to ...

Our previous blog article, “The Part of PostgreSQL We Hate the Most,” discussed the problems caused by everyone’s favorite street-strength DBMS multi-version concurrency control (MVCC) implementation.

The SQL-judge compares a student's solution based on the result, so the students' query does not have to be the same as the query of the model solution, as long as the result is the same. For each ...

This paper aims to establish a relative study between a relational Microsoft SQL Server database and a non-relational MongoDB database within the unstructured representation of data in JSON format.

Data has become the lifeblood of the enterprise. It’s the foundation for keen insight and effective decisions that lead to business growth. One of our primary design goals for SQL Server 2016 was to ...