GeoMesa: An Open-Source Spatio-Temporal Database Layer — GeoMesa provides spatio-temporal indexing on top of Accumulo, Bigtable, and Cassandra, as well as near real-time stream processing and spatial semantics on top of Kafka.

Amazon Redshift Spectrum: Exabyte-Scale In-Place Queries of S3 Data — Spectrum makes it possible to run complex queries using Redshift on data stored on AWS S3 without any loading or data prep.

The Top Features Coming to SQL Server 2017 — A summary of what Microsoft has unveiled as coming to SQL Server 2017 from Python support to adaptive query optimization and a built-in graph database.

High Available and Scalable Open Source Database - SiriDB — The time series database SiriDB can scale on the fly, is robust by design and uses a unique mechanism to operate without indexes. SiriDB’s query language includes dynamic grouping for easy and fast analysis. GitHub repo

How to Calculate Multiple Aggregate Functions in a Single Query — A look at alternatives to using a large collection of SQL queries to query the same data in different ways, such as pivots and grouping sets.

Architecture of Giants: Data Stacks at Facebook, Netflix, Airbnb, and Pinterest — Simple event data infrastructure diagrams from several fast-scaling companies.

Why to Use A Relational Database for Time-Series Data — NoSQL databases are commonly used to store time-series data, but the creator of TimescaleDB sets out a technical case for bringing time-series data into a relational setup.