JOIN Elimination: An Essential Optimization for Advanced SQL Usage — It’s possible to transform many SQL statements into more optimized ones. This is a deep dive into how that works when joins are involved.

How Salesforce Is Using AI to 'Democratize' SQL — ..so anyone can query databases in natural language. It’s explained in detail in this academic paper.

Understanding Tricky Joins and Multi-Table Updates — Writing a proper SQL UPDATE query involving multiple tables in Postgres can be tricky and counterintuitive. Here’s a particularly tricky example and the concepts involved.

HumongouS.io: A universal admin interface for MongoDB — Generate automatically an enterprise grade admin interface for your MongoDB database with support for joins, custom views, smart forms and charts.

Five Sharding Data Models and Which Is Right — A survey of five sharding approaches and what factors could guide you to each approach.

Deferrable SQL Constraints in Depth — Automatic constraint enforcement is a useful and powerful feature, but sometimes there are reasons to defer enforcement, as examined in depth here.

How We Designed CrateDB as a Realtime SQL DBMS for IoT — The DBMS design choices that Crate.io made to support an IoT workload.

KSQL: Open Source Streaming SQL for Apache Kafka — KSQL provides a simple and interactive SQL interface for processing data in Kafka, rather than having to write Python or Java functions.

Percona Live Europe 2017 - Dublin (25-27 September) — Join the Open Source database community for various talks on MySQL, MongoDB, MariaDB, PostgreSQL, RocksDB & more.

Using JS for Extending Low-Latency In-Memory Key-Value Stores — A look at the potential for JavaScript in RAMCloud.

The Hidden Costs of Data Engineering — Managing databases in today's environments presents many complex problems. See the impact in this 2016 survey.