A free, simple tool to draw ER diagrams by just writing code.

Introduction to EdgeDB and its query language EdgeQL. The book is divided into 20 chapters in which we imagine that we are creating a database for a game. The setting for the imaginary game is the scenes and locations from the book Dracula by Bram Stoker.

ClojureQL allows you to express powerful database queries through simple, elegant, Clojure expressions. Out of the box it compiles to SQL92 which ensures compatability with PostgreSQL and MySQL.

ClojureQLs strength lies in its implementation of the primitives defined in Relational Algebra which allows queries to be composed freely.

This whitepaper will help you understand one of the most popular NoSQL options available with the AWS cloudcomputing platform — the open source application MongoDB. We provide an overview of general best practices thatapply to all major NoSQL options, and we examine important MongoDB implementation characteristics such asperformance, durability, and security. We pay particular attention to identifying features that support scalability, high-availability, and fault-tolerance.